| Order (Family Common Name) | Scientific Name (previously known as) |
| Ephemeroptera (Armored Mayfly) | Baetisca becki |
| Ephemeroptera (Armored Mayfly) | Baetisca berneri |
| Ephemeroptera (Armored Mayfly) | Baetisca carolina |
| Ephemeroptera (Armored Mayfly) | = (Baetisca thomsenae) |
| Ephemeroptera (Armored Mayfly) | Baetisca columbiana |
| Ephemeroptera (Armored Mayfly) | Baetisca escambiensis |
| Ephemeroptera (Armored Mayfly) | Baetisca gibbera |
| Ephemeroptera (Armored Mayfly) | Baetisca lacustris |
| Ephemeroptera (Armored Mayfly) | = (Baetisca bajkovi) |
| Ephemeroptera (Armored Mayfly) | Baetisca laurentina |
| Ephemeroptera (Armored Mayfly) | Baetisca obesa |
| Ephemeroptera (Armored Mayfly) | = (Baetis obesa) |
| Ephemeroptera (Armored Mayfly) | Baetisca rogersi |
| Ephemeroptera (Armored Mayfly) | Baetisca rubescens |
| Ephemeroptera (Armored Mayfly) | = (Baetis rubescens) |
| Ephemeroptera (Armored Mayfly) | = (Cloe rubescens) |
| Ephemeroptera (Bushlegged Mayfly) | Homoeoneuria alleni |
| Ephemeroptera (Bushlegged Mayfly) | Homoeoneuria ammophila |
| Ephemeroptera (Bushlegged Mayfly) | = (Oligoneuria ammophila) |
| Ephemeroptera (Bushlegged Mayfly) | Homoeoneuria cahabensis |
| Ephemeroptera (Bushlegged Mayfly) | Homoeoneuria dolani |
| Ephemeroptera (Bushlegged Mayfly) | Homoeoneuria salviniae |
| Ephemeroptera (Bushlegged Mayfly) | Isonychia arida |
| Ephemeroptera (Bushlegged Mayfly) | = (Baetis arida) |
| Ephemeroptera (Bushlegged Mayfly) | = (Isonychia pictipes) |
| Ephemeroptera (Bushlegged Mayfly) | Isonychia berneri |
| Ephemeroptera (Bushlegged Mayfly) | Isonychia bicolor |
| Ephemeroptera (Bushlegged Mayfly) | = (Chirotonetes albomanicatus) |
| Ephemeroptera (Bushlegged Mayfly) | = (Isonychia albomanicata) |
| Ephemeroptera (Bushlegged Mayfly) | = (Isonychia christina) |
| Ephemeroptera (Bushlegged Mayfly) | = (Isonychia circe) |
| Ephemeroptera (Bushlegged Mayfly) | = (Isonychia fattigi) |
| Ephemeroptera (Bushlegged Mayfly) | = (Isonychia harperi) |
| Ephemeroptera (Bushlegged Mayfly) | = (Isonychia matilda) |
| Ephemeroptera (Bushlegged Mayfly) | = (Isonychia pacoleta) |
| Ephemeroptera (Bushlegged Mayfly) | = (Isonychia sadleri) |
| Ephemeroptera (Bushlegged Mayfly) | = (Palingenia bicolor) |
| Ephemeroptera (Bushlegged Mayfly) | = (Siphlurus bicolor) |
| Ephemeroptera (Bushlegged Mayfly) | Isonychia campestris |
| Ephemeroptera (Bushlegged Mayfly) | = (Isonychia sicca campestris) |
| Ephemeroptera (Bushlegged Mayfly) | Isonychia georgiae |
| Ephemeroptera (Bushlegged Mayfly) | = (Isonychia annulata) |
| Ephemeroptera (Bushlegged Mayfly) | = (Isonychia notata) |
| Ephemeroptera (Bushlegged Mayfly) | = (Isonychia thalia) |
| Ephemeroptera (Bushlegged Mayfly) | Isonychia hoffmani |
| Ephemeroptera (Bushlegged Mayfly) | Isonychia intermedia |
| Ephemeroptera (Bushlegged Mayfly) | = (Chirotonetes intermedius) |
| Ephemeroptera (Bushlegged Mayfly) | Isonychia obscura |
| Ephemeroptera (Bushlegged Mayfly) | Isonychia rufa |
| Ephemeroptera (Bushlegged Mayfly) | Isonychia sayi |
| Ephemeroptera (Bushlegged Mayfly) | Isonychia serrata |
| Ephemeroptera (Bushlegged Mayfly) | Isonychia sicca |
| Ephemeroptera (Bushlegged Mayfly) | = (Baetis sicca) |
| Ephemeroptera (Bushlegged Mayfly) | = (Chirotonetes mancus) |
| Ephemeroptera (Bushlegged Mayfly) | = (Chirotonetes siccus) |
| Ephemeroptera (Bushlegged Mayfly) | = (Isonychia edmundsi) |
| Ephemeroptera (Bushlegged Mayfly) | = (Isonychia manca) |
| Ephemeroptera (Bushlegged Mayfly) | = (Isonychia sicca manca) |
| Ephemeroptera (Bushlegged Mayfly) | = (Isonychia sicca sicca) |
| Ephemeroptera (Bushlegged Mayfly) | = (Siphlurus siccus) |
| Ephemeroptera (Bushlegged Mayfly) | Isonychia similis |
| Ephemeroptera (Bushlegged Mayfly) | = (Isonychia aurea) |
| Ephemeroptera (Bushlegged Mayfly) | Isonychia tusculanensis |
| Ephemeroptera (Bushlegged Mayfly) | Isonychia velma |
| Ephemeroptera (Bushlegged Mayfly) | Lachlania dencyanna |
| Ephemeroptera (Bushlegged Mayfly) | = (Lachlania dencyannae) |
| Ephemeroptera (Bushlegged Mayfly) | Lachlania iops |
| Ephemeroptera (Bushlegged Mayfly) | Lachlania saskatchewanensis |
| Ephemeroptera (Bushlegged Mayfly) | = (Lachlania powelli) |
| Ephemeroptera (Cleftfoot Minnow Mayfly) | Metretopus alter |
| Ephemeroptera (Cleftfoot Minnow Mayfly) | Metretopus borealis |
| Ephemeroptera (Cleftfoot Minnow Mayfly) | = (Heptagenia borealis) |
| Ephemeroptera (Cleftfoot Minnow Mayfly) | = (Metretopus norvegicus) |
| Ephemeroptera (Cleftfoot Minnow Mayfly) | = (Rhithrogena borealis) |
| Ephemeroptera (Cleftfoot Minnow Mayfly) | Siphloplecton basale |
| Ephemeroptera (Cleftfoot Minnow Mayfly) | = (Baetis basalis) |
| Ephemeroptera (Cleftfoot Minnow Mayfly) | = (Heptagenia basalis) |
| Ephemeroptera (Cleftfoot Minnow Mayfly) | = (Siphloplecton basalis) |
| Ephemeroptera (Cleftfoot Minnow Mayfly) | = (Siphloplecton flexus) |
| Ephemeroptera (Cleftfoot Minnow Mayfly) | = (Siphloplecton signatum) |
| Ephemeroptera (Cleftfoot Minnow Mayfly) | = (Siphlurus flexus) |
| Ephemeroptera (Cleftfoot Minnow Mayfly) | Siphloplecton brunneum |
| Ephemeroptera (Cleftfoot Minnow Mayfly) | Siphloplecton costalense |
| Ephemeroptera (Cleftfoot Minnow Mayfly) | Siphloplecton fuscum |
| Ephemeroptera (Cleftfoot Minnow Mayfly) | Siphloplecton interlineatum |
| Ephemeroptera (Cleftfoot Minnow Mayfly) | = (Baetis femorata) |
| Ephemeroptera (Cleftfoot Minnow Mayfly) | = (Baetis interlineata) |
| Ephemeroptera (Cleftfoot Minnow Mayfly) | Siphloplecton simile |
| Ephemeroptera (Cleftfoot Minnow Mayfly) | Siphloplecton speciosum |
| Ephemeroptera (Common Burrower Mayfly) | Ephemera blanda |
| Ephemeroptera (Common Burrower Mayfly) | = (Ephemera triplex) |
| Ephemeroptera (Common Burrower Mayfly) | Ephemera guttulata |
| Ephemeroptera (Common Burrower Mayfly) | Ephemera simulans |
| Ephemeroptera (Common Burrower Mayfly) | = (Ephemera decora) |
| Ephemeroptera (Common Burrower Mayfly) | = (Ephemera natata) |
| Ephemeroptera (Common Burrower Mayfly) | = (Palingenia natata) |
| Ephemeroptera (Common Burrower Mayfly) | Ephemera traverae |
| Ephemeroptera (Common Burrower Mayfly) | = (Ephemera traveri) |
| Ephemeroptera (Common Burrower Mayfly) | Ephemera varia |
| Ephemeroptera (Common Burrower Mayfly) | Hexagenia albivitta |
| Ephemeroptera (Common Burrower Mayfly) | = (Baetis albivitta) |
| Ephemeroptera (Common Burrower Mayfly) | = (Hexagenia albivittata) |
| Ephemeroptera (Common Burrower Mayfly) | = (Hexagenia benedicta) |
| Ephemeroptera (Common Burrower Mayfly) | = (Hexagenia dominans) |
| Ephemeroptera (Common Burrower Mayfly) | = (Palingenia continua) |
| Ephemeroptera (Common Burrower Mayfly) | = (Palingenia dorsigera) |
| Ephemeroptera (Common Burrower Mayfly) | Hexagenia atrocaudata |
| Ephemeroptera (Common Burrower Mayfly) | Hexagenia bilineata |
| Ephemeroptera (Common Burrower Mayfly) | = (Baetis bilineata) |
| Ephemeroptera (Common Burrower Mayfly) | = (Palingenia bilineata) |
| Ephemeroptera (Common Burrower Mayfly) | Hexagenia limbata |
| Ephemeroptera (Common Burrower Mayfly) | = (Ephemera limbata) |
| Ephemeroptera (Common Burrower Mayfly) | = (Hexagenia affiliata) |
| Ephemeroptera (Common Burrower Mayfly) | = (Hexagenia californica) |
| Ephemeroptera (Common Burrower Mayfly) | = (Hexagenia carolina) |
| Ephemeroptera (Common Burrower Mayfly) | = (Hexagenia elegans) |
| Ephemeroptera (Common Burrower Mayfly) | = (Hexagenia kanuga) |
| Ephemeroptera (Common Burrower Mayfly) | = (Hexagenia marilandica) |
| Ephemeroptera (Common Burrower Mayfly) | = (Hexagenia mingo) |
| Ephemeroptera (Common Burrower Mayfly) | = (Hexagenia munda) |
| Ephemeroptera (Common Burrower Mayfly) | = (Hexagenia occulta) |
| Ephemeroptera (Common Burrower Mayfly) | = (Hexagenia pallens) |
| Ephemeroptera (Common Burrower Mayfly) | = (Hexagenia rosacea) |
| Ephemeroptera (Common Burrower Mayfly) | = (Hexagenia variabilis) |
| Ephemeroptera (Common Burrower Mayfly) | = (Hexagenia venusta) |
| Ephemeroptera (Common Burrower Mayfly) | = (Hexagenia viridescens) |
| Ephemeroptera (Common Burrower Mayfly) | = (Hexagenia weewa) |
| Ephemeroptera (Common Burrower Mayfly) | = (Palingenia limbata) |
| Ephemeroptera (Common Burrower Mayfly) | = (Palingenia occulta) |
| Ephemeroptera (Common Burrower Mayfly) | = (Palingenia viridescens) |
| Ephemeroptera (Common Burrower Mayfly) | Hexagenia mexicana |
| Ephemeroptera (Common Burrower Mayfly) | Hexagenia orlando |
| Ephemeroptera (Common Burrower Mayfly) | Hexagenia rigida |
| Ephemeroptera (Common Burrower Mayfly) | = (Hexagenia form falcata) |
| Ephemeroptera (Common Burrower Mayfly) | Litobrancha recurvata |
| Ephemeroptera (Common Burrower Mayfly) | = (Hexagenia recurrata) |
| Ephemeroptera (Common Burrower Mayfly) | = (Hexagenia recurvata) |
| Ephemeroptera (Flatheaded Mayfly) | Anepeorus rusticus |
| Ephemeroptera (Flatheaded Mayfly) | = (Acanthomola pubescens) |
| Ephemeroptera (Flatheaded Mayfly) | Arthroplea bipunctata |
| Ephemeroptera (Flatheaded Mayfly) | = (Cinygma bipunctata) |
| Ephemeroptera (Flatheaded Mayfly) | Cinygma dimicki |
| Ephemeroptera (Flatheaded Mayfly) | Cinygma integrum |
| Ephemeroptera (Flatheaded Mayfly) | Cinygma lyriforme |
| Ephemeroptera (Flatheaded Mayfly) | = (Cinygma lyriformis) |
| Ephemeroptera (Flatheaded Mayfly) | = (Cinygma petersoni) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus hyalinus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus lyriformis) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus peterseni) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia abnorme) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia abnormis) |
| Ephemeroptera (Flatheaded Mayfly) | Cinygmula gartrelli |
| Ephemeroptera (Flatheaded Mayfly) | = (Rhithrogena gartrelli) |
| Ephemeroptera (Flatheaded Mayfly) | Cinygmula kootenai |
| Ephemeroptera (Flatheaded Mayfly) | = (Rhithrogena kootenai) |
| Ephemeroptera (Flatheaded Mayfly) | Cinygmula mimus |
| Ephemeroptera (Flatheaded Mayfly) | = (Cinygma mimus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Rhithrogena mimus) |
| Ephemeroptera (Flatheaded Mayfly) | Cinygmula par |
| Ephemeroptera (Flatheaded Mayfly) | = (Cinygma confusa) |
| Ephemeroptera (Flatheaded Mayfly) | = (Cinygma hyalina) |
| Ephemeroptera (Flatheaded Mayfly) | = (Cinygma par) |
| Ephemeroptera (Flatheaded Mayfly) | = (Cinygmula confusa) |
| Ephemeroptera (Flatheaded Mayfly) | = (Cinygmula hyalina) |
| Ephemeroptera (Flatheaded Mayfly) | = (Rhithrogena confusa) |
| Ephemeroptera (Flatheaded Mayfly) | = (Rhithrogena par) |
| Ephemeroptera (Flatheaded Mayfly) | Cinygmula ramaleyi |
| Ephemeroptera (Flatheaded Mayfly) | = (Cinygma ramaleyi) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus ramaleyi) |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron tollandi) |
| Ephemeroptera (Flatheaded Mayfly) | = (Rhithrogena ramaleyi) |
| Ephemeroptera (Flatheaded Mayfly) | Cinygmula reticulata |
| Ephemeroptera (Flatheaded Mayfly) | = (Rhithrogena reticulata) |
| Ephemeroptera (Flatheaded Mayfly) | Cinygmula subaequalis |
| Ephemeroptera (Flatheaded Mayfly) | = (Cinygma atlantica) |
| Ephemeroptera (Flatheaded Mayfly) | = (Cinygmula atlantica) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia subaequalis) |
| Ephemeroptera (Flatheaded Mayfly) | = (Rhithrogena subaequalis) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema subaequalis) |
| Ephemeroptera (Flatheaded Mayfly) | Cinygmula tarda |
| Ephemeroptera (Flatheaded Mayfly) | = (Cinygma tarda) |
| Ephemeroptera (Flatheaded Mayfly) | = (Rhithrogena tarda) |
| Ephemeroptera (Flatheaded Mayfly) | Cinygmula tioga |
| Ephemeroptera (Flatheaded Mayfly) | = (Rhithrogena tioga) |
| Ephemeroptera (Flatheaded Mayfly) | Cinygmula uniformis |
| Ephemeroptera (Flatheaded Mayfly) | = (Rhithrogena uniformis) |
| Ephemeroptera (Flatheaded Mayfly) | Ecdyonurus bellus |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia bella) |
| Ephemeroptera (Flatheaded Mayfly) | = (Nixe bella) |
| Ephemeroptera (Flatheaded Mayfly) | Ecdyonurus criddlei |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus otiosus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus rosea) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus salvini) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia criddlei) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia otiosa) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia rosea) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia rubroventris) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia salvini) |
| Ephemeroptera (Flatheaded Mayfly) | = (Nixe criddlei) |
| Ephemeroptera (Flatheaded Mayfly) | = (Nixe otiosa) |
| Ephemeroptera (Flatheaded Mayfly) | = (Nixe rosea) |
| Ephemeroptera (Flatheaded Mayfly) | = (Nixe salvini) |
| Ephemeroptera (Flatheaded Mayfly) | Ecdyonurus simplicioides |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus rodocki) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus werestschagini) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia rodocki) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia simpliciodes) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia simplicioides) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia werestschagini) |
| Ephemeroptera (Flatheaded Mayfly) | = (Nixe rodocki) |
| Ephemeroptera (Flatheaded Mayfly) | = (Nixe simpliciodes) |
| Ephemeroptera (Flatheaded Mayfly) | = (Rhithrogena imanica) |
| Ephemeroptera (Flatheaded Mayfly) | Epeorus albertae |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron albertae) |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron youngi) |
| Ephemeroptera (Flatheaded Mayfly) | Epeorus deceptivus |
| Ephemeroptera (Flatheaded Mayfly) | = (Cinygma deceptiva) |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron deceptivus) |
| Ephemeroptera (Flatheaded Mayfly) | Epeorus dispar |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron dispar) |
| Ephemeroptera (Flatheaded Mayfly) | Epeorus dulciana |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron dulciana) |
| Ephemeroptera (Flatheaded Mayfly) | Epeorus fragilis |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron fragilis) |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron tenuis) |
| Ephemeroptera (Flatheaded Mayfly) | Epeorus frisoni |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron frisoni) |
| Ephemeroptera (Flatheaded Mayfly) | Epeorus grandis |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron grandis) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ironopsis grandis) |
| Ephemeroptera (Flatheaded Mayfly) | Epeorus hesperus |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron hesperus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron sancta-gabriel) |
| Ephemeroptera (Flatheaded Mayfly) | = (Rhithrogena hespera) |
| Ephemeroptera (Flatheaded Mayfly) | Epeorus lagunitas |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron lagunitas) |
| Ephemeroptera (Flatheaded Mayfly) | Epeorus longimanus |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron longimanus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron proprius) |
| Ephemeroptera (Flatheaded Mayfly) | Epeorus margarita |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron margarita) |
| Ephemeroptera (Flatheaded Mayfly) | Epeorus metlacensis |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron metlacensis) |
| Ephemeroptera (Flatheaded Mayfly) | Epeorus namatus |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron namatus) |
| Ephemeroptera (Flatheaded Mayfly) | Epeorus permagnus |
| Ephemeroptera (Flatheaded Mayfly) | = (Ironopsis permagnus) |
| Ephemeroptera (Flatheaded Mayfly) | Epeorus pleuralis |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia pleuralis) |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron confusus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron fraudator) |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron pleuralis) |
| Ephemeroptera (Flatheaded Mayfly) | Epeorus punctatus |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron punctatus) |
| Ephemeroptera (Flatheaded Mayfly) | Epeorus subpallidus |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron subpallidus) |
| Ephemeroptera (Flatheaded Mayfly) | Epeorus suffusus |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron suffusus) |
| Ephemeroptera (Flatheaded Mayfly) | Epeorus vitreus |
| Ephemeroptera (Flatheaded Mayfly) | = (Epeorus humeralis) |
| Ephemeroptera (Flatheaded Mayfly) | = (Epeorus rubidus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia vitrea) |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron humeralis) |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron rubidus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron vitreus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Palingenia vitrea) |
| Ephemeroptera (Flatheaded Mayfly) | = (Rhithrogena vitrea) |
| Ephemeroptera (Flatheaded Mayfly) | Heptagenia adaequata |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia adequata) |
| Ephemeroptera (Flatheaded Mayfly) | Heptagenia culacantha |
| Ephemeroptera (Flatheaded Mayfly) | Heptagenia dolosa |
| Ephemeroptera (Flatheaded Mayfly) | Heptagenia elegantula |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia coxalis) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia diabasia) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia querula) |
| Ephemeroptera (Flatheaded Mayfly) | = (Rhithrogena elegantula) |
| Ephemeroptera (Flatheaded Mayfly) | Heptagenia flavescens |
| Ephemeroptera (Flatheaded Mayfly) | = (Palingenia flavescens) |
| Ephemeroptera (Flatheaded Mayfly) | Heptagenia julia |
| Ephemeroptera (Flatheaded Mayfly) | Heptagenia marginalis |
| Ephemeroptera (Flatheaded Mayfly) | Heptagenia patoka |
| Ephemeroptera (Flatheaded Mayfly) | Heptagenia pulla |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus pullus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyurus grandis) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyurus pullus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia pullus) |
| Ephemeroptera (Flatheaded Mayfly) | Heptagenia solitaria |
| Ephemeroptera (Flatheaded Mayfly) | Heptagenia townesi |
| Ephemeroptera (Flatheaded Mayfly) | Heptagenia whitingi |
| Ephemeroptera (Flatheaded Mayfly) | Ironodes arctus |
| Ephemeroptera (Flatheaded Mayfly) | = (Epeorus arctus) |
| Ephemeroptera (Flatheaded Mayfly) | Ironodes californicus |
| Ephemeroptera (Flatheaded Mayfly) | = (Epeorus californicus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron californicus) |
| Ephemeroptera (Flatheaded Mayfly) | Ironodes flavipennis |
| Ephemeroptera (Flatheaded Mayfly) | = (Epeorus flavipennis) |
| Ephemeroptera (Flatheaded Mayfly) | = (Cinygma geminatum) |
| Ephemeroptera (Flatheaded Mayfly) | = (Epeorus geminatus) |
| Ephemeroptera (Flatheaded Mayfly) | Ironodes lepidus |
| Ephemeroptera (Flatheaded Mayfly) | = (Epeorus lepidus) |
| Ephemeroptera (Flatheaded Mayfly) | Ironodes nitidus |
| Ephemeroptera (Flatheaded Mayfly) | = (Epeorus nitidus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron nitidus) |
| Ephemeroptera (Flatheaded Mayfly) | Leucrocuta aphrodite |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus aphrodite) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia aphrodite) |
| Ephemeroptera (Flatheaded Mayfly) | Leucrocuta hebe |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus hebe) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia hebe) |
| Ephemeroptera (Flatheaded Mayfly) | Leucrocuta jewetti |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus jewetti) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia jewetti) |
| Ephemeroptera (Flatheaded Mayfly) | Leucrocuta juno |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus juno) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia juno) |
| Ephemeroptera (Flatheaded Mayfly) | Leucrocuta maculipennis |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus maculipennis) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyurus maculipennis) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia maculipennis) |
| Ephemeroptera (Flatheaded Mayfly) | Leucrocuta minerva |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus minerva) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia minerva) |
| Ephemeroptera (Flatheaded Mayfly) | Leucrocuta petersi |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus petersi) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia petersi) |
| Ephemeroptera (Flatheaded Mayfly) | Leucrocuta thetis |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus thetis) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia thetis) |
| Ephemeroptera (Flatheaded Mayfly) | Leucrocuta umbratica |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus umbraticus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia umbratica) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia umbricata) |
| Ephemeroptera (Flatheaded Mayfly) | Leucrocuta walshi |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus walshi) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia walshi) |
| Ephemeroptera (Flatheaded Mayfly) | Maccaffertium bednariki |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia bednariki) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema bednariki) |
| Ephemeroptera (Flatheaded Mayfly) | Maccaffertium carlsoni |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia carlsoni) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema carlsoni) |
| Ephemeroptera (Flatheaded Mayfly) | Maccaffertium exiguum |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia exigua) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema alabamae) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema exiguum) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema quinquespinum) |
| Ephemeroptera (Flatheaded Mayfly) | = (Baetis flaveola) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia flaveola) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema flaveolum) |
| Ephemeroptera (Flatheaded Mayfly) | Maccaffertium ithaca |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus ithaca) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia ithaca) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema allegheniense) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema ithaca) |
| Ephemeroptera (Flatheaded Mayfly) | Maccaffertium lenati |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema lenati) |
| Ephemeroptera (Flatheaded Mayfly) | Maccaffertium luteum |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus luteus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia lutea) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema luteum) |
| Ephemeroptera (Flatheaded Mayfly) | Maccaffertium mediopunctatum arwini |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia mediopunctata arwini) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema mediopunctata arwini) |
| Ephemeroptera (Flatheaded Mayfly) | Maccaffertium mediopunctatum mediopunctatum |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus mediopunctatus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus nepotellus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia mediopunctata) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia mediopunctata mediopunctata) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema mediopunctatum) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema mediopunctatum mediopunctatum) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema nepotellum) |
| Ephemeroptera (Flatheaded Mayfly) | Maccaffertium meririvulanum |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia meririvulana) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema meririvulanum) |
| Ephemeroptera (Flatheaded Mayfly) | Maccaffertium mexicanum integrum |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia integer) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia mexicana integer) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema bellum) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema integrum) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema metriotes) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema mexicanum integrum) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema wabasha) |
| Ephemeroptera (Flatheaded Mayfly) | Maccaffertium mexicanum mexicanum |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia mexicana) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia mexicana mexicana) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema mexicana) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema mexicanum mexicanum) |
| Ephemeroptera (Flatheaded Mayfly) | Maccaffertium modestum |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus ruber) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus rubromaculatus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Epeorus modestus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia modesta) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia rubromaculata) |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron modestus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema annexum) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema modestum) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema ruber) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema rubromaculatum) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema rubrum) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema varium) |
| Ephemeroptera (Flatheaded Mayfly) | Maccaffertium pudicum |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus pudicus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ephemera pudica) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia pudica) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema pudicum) |
| Ephemeroptera (Flatheaded Mayfly) | Maccaffertium pulchellum |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus pulchellus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia luridipennnis) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia pulchella) |
| Ephemeroptera (Flatheaded Mayfly) | = (Palingenia pulchella) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema pulchellum) |
| Ephemeroptera (Flatheaded Mayfly) | Maccaffertium sinclairi |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia sinclairi) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema sinclairi) |
| Ephemeroptera (Flatheaded Mayfly) | Maccaffertium smithae |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia smithae) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema smithae) |
| Ephemeroptera (Flatheaded Mayfly) | Maccaffertium terminatum placitum |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus placita) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia placita) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia terminata placita) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema placitum) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema terminatum placitum) |
| Ephemeroptera (Flatheaded Mayfly) | Maccaffertium terminatum terminatum |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus bipunctatus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus terminatus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia terminata) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia terminata terminata) |
| Ephemeroptera (Flatheaded Mayfly) | = (Palingenia terminata) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema ares) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema bipunctatum) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema lepton) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema terminatum) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema terminatum terminatum) |
| Ephemeroptera (Flatheaded Mayfly) | Maccaffertium vicarium |
| Ephemeroptera (Flatheaded Mayfly) | = (Baetis tessellata) |
| Ephemeroptera (Flatheaded Mayfly) | = (Baetis vicaria) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus fusca) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus fuscum) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus fuscus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus rivulicolus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus vicarius) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyurus vicarius) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia fusca) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia vicaria) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema fuscum) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema rivulicolum) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema tessellata) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema vicarium) |
| Ephemeroptera (Flatheaded Mayfly) | Macdunnoa brunnea |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia brunnea) |
| Ephemeroptera (Flatheaded Mayfly) | Macdunnoa nipawinia |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia nipawinia) |
| Ephemeroptera (Flatheaded Mayfly) | Macdunnoa persimplex |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia persimplex) |
| Ephemeroptera (Flatheaded Mayfly) | Nixe flowersi |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus flowersi) |
| Ephemeroptera (Flatheaded Mayfly) | Nixe horrida |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus horridus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia horrida) |
| Ephemeroptera (Flatheaded Mayfly) | Nixe inconspicua |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus inconspicuus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia inconspicua) |
| Ephemeroptera (Flatheaded Mayfly) | Nixe kennedyi |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus kennedyi) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia kennedyi) |
| Ephemeroptera (Flatheaded Mayfly) | Nixe lucidipennis |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus lucidipennis) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyurus lucidipennis) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia lucidipennis) |
| Ephemeroptera (Flatheaded Mayfly) | Nixe perfida |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus perfidus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia perfida) |
| Ephemeroptera (Flatheaded Mayfly) | Nixe rusticalis |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus rusticalis) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia rusticalis) |
| Ephemeroptera (Flatheaded Mayfly) | Nixe spinosa |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia spinosa) |
| Ephemeroptera (Flatheaded Mayfly) | Raptoheptagenia cruentata |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia cruentata) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia reversalis) |
| Ephemeroptera (Flatheaded Mayfly) | Rhithrogena amica |
| Ephemeroptera (Flatheaded Mayfly) | Rhithrogena anomala |
| Ephemeroptera (Flatheaded Mayfly) | Rhithrogena brunneotincta |
| Ephemeroptera (Flatheaded Mayfly) | Rhithrogena decora |
| Ephemeroptera (Flatheaded Mayfly) | Rhithrogena exilis |
| Ephemeroptera (Flatheaded Mayfly) | Rhithrogena fasciata |
| Ephemeroptera (Flatheaded Mayfly) | Rhithrogena flavianula |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia flavianula) |
| Ephemeroptera (Flatheaded Mayfly) | Rhithrogena fuscifrons |
| Ephemeroptera (Flatheaded Mayfly) | Rhithrogena futilis |
| Ephemeroptera (Flatheaded Mayfly) | Rhithrogena gaspeensis |
| Ephemeroptera (Flatheaded Mayfly) | Rhithrogena hageni |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia brunnea) |
| Ephemeroptera (Flatheaded Mayfly) | = (Rhithrogena brunnea) |
| Ephemeroptera (Flatheaded Mayfly) | = (Rhithrogena doddsi) |
| Ephemeroptera (Flatheaded Mayfly) | Rhithrogena impersonata |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia impersonata) |
| Ephemeroptera (Flatheaded Mayfly) | = (Rhithrogena sanguinea) |
| Ephemeroptera (Flatheaded Mayfly) | Rhithrogena ingalik |
| Ephemeroptera (Flatheaded Mayfly) | Rhithrogena jejuna |
| Ephemeroptera (Flatheaded Mayfly) | = (Baetis fusca) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia fusca) |
| Ephemeroptera (Flatheaded Mayfly) | = (Rhithrogena fusca) |
| Ephemeroptera (Flatheaded Mayfly) | Rhithrogena manifesta |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia manifesta) |
| Ephemeroptera (Flatheaded Mayfly) | = (Rhithrogena pellucida) |
| Ephemeroptera (Flatheaded Mayfly) | Rhithrogena morrisoni |
| Ephemeroptera (Flatheaded Mayfly) | = (Epeorus morrisoni) |
| Ephemeroptera (Flatheaded Mayfly) | = (Iron petulans) |
| Ephemeroptera (Flatheaded Mayfly) | = (Rhithrogena petulans) |
| Ephemeroptera (Flatheaded Mayfly) | Rhithrogena notialis |
| Ephemeroptera (Flatheaded Mayfly) | Rhithrogena plana |
| Ephemeroptera (Flatheaded Mayfly) | = (Rhithrogena vitta) |
| Ephemeroptera (Flatheaded Mayfly) | Rhithrogena robusta |
| Ephemeroptera (Flatheaded Mayfly) | Rhithrogena rubicunda |
| Ephemeroptera (Flatheaded Mayfly) | Rhithrogena uhari |
| Ephemeroptera (Flatheaded Mayfly) | Rhithrogena undulata |
| Ephemeroptera (Flatheaded Mayfly) | = (Epeorus undulata) |
| Ephemeroptera (Flatheaded Mayfly) | = (Epeorus undulatus) |
| Ephemeroptera (Flatheaded Mayfly) | Rhithrogena virilis |
| Ephemeroptera (Flatheaded Mayfly) | Spinadis simplex |
| Ephemeroptera (Flatheaded Mayfly) | = (Anepeorus simplex) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia simplex) |
| Ephemeroptera (Flatheaded Mayfly) | = (Spinadis wallacei) |
| Ephemeroptera (Flatheaded Mayfly) | Stenacron candidum |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia candida) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema candidum) |
| Ephemeroptera (Flatheaded Mayfly) | Stenacron carolina |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus carolina) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia carolina) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema carolina) |
| Ephemeroptera (Flatheaded Mayfly) | Stenacron floridense |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia floridensis) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema floridense) |
| Ephemeroptera (Flatheaded Mayfly) | Stenacron gildersleevei |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia gildersleevei) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema gildersleevei) |
| Ephemeroptera (Flatheaded Mayfly) | Stenacron interpunctatum |
| Ephemeroptera (Flatheaded Mayfly) | = (Baetis canadensis) |
| Ephemeroptera (Flatheaded Mayfly) | = (Baetis interpunctata) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus canadensis) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus frontalis) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus heterotarsalis) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyurus canadensis) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia canadensis) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia frontalis) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia interpunctata) |
| Ephemeroptera (Flatheaded Mayfly) | = (Palingenia interpunctata) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenacron areion) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenacron canadense) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenacron frontale) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenacron heterotarsale) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema affine) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema areion) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema canadense) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema conjunctum) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema frontale) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema heterotarsale) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema interpunctatum) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema majus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema ohioense) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema proximum) |
| Ephemeroptera (Flatheaded Mayfly) | Stenacron minnetonka |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia minnetonka) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema minnetonka) |
| Ephemeroptera (Flatheaded Mayfly) | Stenacron pallidum |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia pallida) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema pallidum) |
| Ephemeroptera (Flatheaded Mayfly) | Stenonema femoratum |
| Ephemeroptera (Flatheaded Mayfly) | = (Baetis femorata) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus femoratus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Ecdyonurus tripunctatus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia femorata) |
| Ephemeroptera (Flatheaded Mayfly) | = (Heptagenia tripunctata) |
| Ephemeroptera (Flatheaded Mayfly) | = (Siphlurus femoratus) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema birdi) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema scitulum) |
| Ephemeroptera (Flatheaded Mayfly) | = (Stenonema tripunctatum) |
| Ephemeroptera (Hacklegill Mayfly) | Anthopotamus distinctus |
| Ephemeroptera (Hacklegill Mayfly) | = (Potamanthus distinctus) |
| Ephemeroptera (Hacklegill Mayfly) | Anthopotamus myops |
| Ephemeroptera (Hacklegill Mayfly) | = (Anthopotamus inequalis) |
| Ephemeroptera (Hacklegill Mayfly) | = (Anthopotamus rufous) |
| Ephemeroptera (Hacklegill Mayfly) | = (Ephemera myops) |
| Ephemeroptera (Hacklegill Mayfly) | = (Potamanthus inequalis) |
| Ephemeroptera (Hacklegill Mayfly) | = (Potamanthus medius) |
| Ephemeroptera (Hacklegill Mayfly) | = (Potamanthus myops) |
| Ephemeroptera (Hacklegill Mayfly) | = (Potamanthus rufous) |
| Ephemeroptera (Hacklegill Mayfly) | = (Potamanthus rufus) |
| Ephemeroptera (Hacklegill Mayfly) | Anthopotamus neglectus disjunctus |
| Ephemeroptera (Hacklegill Mayfly) | Anthopotamus neglectus neglectus |
| Ephemeroptera (Hacklegill Mayfly) | = (Anthopotamus neglectus) |
| Ephemeroptera (Hacklegill Mayfly) | = (Potamanthus neglectus) |
| Ephemeroptera (Hacklegill Mayfly) | Anthopotamus verticis |
| Ephemeroptera (Hacklegill Mayfly) | = (Anthopotamus diaphanus) |
| Ephemeroptera (Hacklegill Mayfly) | = (Anthopotamus walkeri) |
| Ephemeroptera (Hacklegill Mayfly) | = (Baetis verticis) |
| Ephemeroptera (Hacklegill Mayfly) | = (Ecdyurus verticis) |
| Ephemeroptera (Hacklegill Mayfly) | = (Ephemera flaveola) |
| Ephemeroptera (Hacklegill Mayfly) | = (Heptagenia verticis) |
| Ephemeroptera (Hacklegill Mayfly) | = (Potamanthus betteni) |
| Ephemeroptera (Hacklegill Mayfly) | = (Potamanthus diaphanus) |
| Ephemeroptera (Hacklegill Mayfly) | = (Potamanthus flaveola) |
| Ephemeroptera (Hacklegill Mayfly) | = (Potamanthus verticis) |
| Ephemeroptera (Hacklegill Mayfly) | = (Potamanthus walkeri) |
| Ephemeroptera (Large Squaregill Mayfly) | Neoephemera bicolor |
| Ephemeroptera (Large Squaregill Mayfly) | Neoephemera compressa |
| Ephemeroptera (Large Squaregill Mayfly) | Neoephemera purpurea |
| Ephemeroptera (Large Squaregill Mayfly) | = (Oreianthus purpureus) |
| Ephemeroptera (Large Squaregill Mayfly) | Neoephemera youngi |
| Ephemeroptera (Little Stout Crawler Mayfly) | Ableptemetes dicinctus |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Leptohyphes dicinctus) |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Tricorythopsis dicinctus) |
| Ephemeroptera (Little Stout Crawler Mayfly) | Allenhyphes vescus |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Allenhyphes michaeli) |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Leptohyphes michaeli) |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Leptohyphes vescus) |
| Ephemeroptera (Little Stout Crawler Mayfly) | Asioplax dolani |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Leptohyphes dolani) |
| Ephemeroptera (Little Stout Crawler Mayfly) | Asioplax edmundsi |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Asioplax corpulenta) |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Tricorythodes corpulentus) |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Tricorythodes edmundsi) |
| Ephemeroptera (Little Stout Crawler Mayfly) | Asioplax numinuh |
| Ephemeroptera (Little Stout Crawler Mayfly) | Asioplax texana |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Tricorythodes texanus) |
| Ephemeroptera (Little Stout Crawler Mayfly) | Homoleptohyphes dimorphus |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Tricorythodes dimorphus) |
| Ephemeroptera (Little Stout Crawler Mayfly) | Homoleptohyphes mirus |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Leptohyphes baumanni) |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Leptohyphes mirus) |
| Ephemeroptera (Little Stout Crawler Mayfly) | Homoleptohyphes quercus |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Leptohyphes quercus) |
| Ephemeroptera (Little Stout Crawler Mayfly) | Leptohyphes alleni |
| Ephemeroptera (Little Stout Crawler Mayfly) | Leptohyphes apache |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Leptohyphes hispidus) |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Leptohyphes lumas) |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Leptohyphes spiculatus) |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Leptohyphes succinus) |
| Ephemeroptera (Little Stout Crawler Mayfly) | Leptohyphes berneri |
| Ephemeroptera (Little Stout Crawler Mayfly) | Leptohyphes ferruginus |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Leptohyphes ferrugineus) |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Leptohyphes piraticus) |
| Ephemeroptera (Little Stout Crawler Mayfly) | Leptohyphes lestes |
| Ephemeroptera (Little Stout Crawler Mayfly) | Leptohyphes musseri |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Leptohyphes brunneus) |
| Ephemeroptera (Little Stout Crawler Mayfly) | Leptohyphes nigripunctatus |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Leptohyphes nigripunctatum) |
| Ephemeroptera (Little Stout Crawler Mayfly) | Leptohyphes pilosus |
| Ephemeroptera (Little Stout Crawler Mayfly) | Leptohyphes sabinas |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Leptohyphes castaneus) |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Leptohyphes consortis) |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Leptohyphes tarsos) |
| Ephemeroptera (Little Stout Crawler Mayfly) | Leptohyphes zalope |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Leptohyphes vulturnus) |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Leptohyphes zelus) |
| Ephemeroptera (Little Stout Crawler Mayfly) | Tricoryhyphes condylus |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Tricorythodes condylus) |
| Ephemeroptera (Little Stout Crawler Mayfly) | Tricoryhyphes mulaiki |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Tricorythodes mulaiki) |
| Ephemeroptera (Little Stout Crawler Mayfly) | Tricorythodes albilineatus |
| Ephemeroptera (Little Stout Crawler Mayfly) | Tricorythodes allectus |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Caenis allecta) |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Tricorythodes atratus) |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Tricorythodes peridius) |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Tricorythus allectus) |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Tricorythus atratus) |
| Ephemeroptera (Little Stout Crawler Mayfly) | Tricorythodes cobbi |
| Ephemeroptera (Little Stout Crawler Mayfly) | Tricorythodes comus |
| Ephemeroptera (Little Stout Crawler Mayfly) | Tricorythodes curvatus |
| Ephemeroptera (Little Stout Crawler Mayfly) | Tricorythodes explicatus |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Tricorythodes fallacina) |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Tricorythodes fallax) |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Tricorythodes minutus) |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Tricorythus explicatus) |
| Ephemeroptera (Little Stout Crawler Mayfly) | Tricorythodes fictus |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Tricorythodes angulatus) |
| Ephemeroptera (Little Stout Crawler Mayfly) | Tricorythodes mosegus |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Tricorythodes mosequs) |
| Ephemeroptera (Little Stout Crawler Mayfly) | Tricorythodes notatus |
| Ephemeroptera (Little Stout Crawler Mayfly) | Tricorythodes robacki |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Leptohyphes robacki) |
| Ephemeroptera (Little Stout Crawler Mayfly) | Tricorythodes sordidus |
| Ephemeroptera (Little Stout Crawler Mayfly) | Tricorythodes stygiatus |
| Ephemeroptera (Little Stout Crawler Mayfly) | Tricorythodes ulmeri |
| Ephemeroptera (Little Stout Crawler Mayfly) | Vacupernius packeri |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Leptohyphes packeri) |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Leptohyphes paraguttatus) |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Leptohyphes phalarobranchus) |
| Ephemeroptera (Little Stout Crawler Mayfly) | = (Vacupernius paraguttatus) |
| Ephemeroptera (Pale Burrower Mayfly) | Campsurus cuspidatus |
| Ephemeroptera (Pale Burrower Mayfly) | Campsurus decoloratus |
| Ephemeroptera (Pale Burrower Mayfly) | = (Hexagenia decolorata) |
| Ephemeroptera (Pale Burrower Mayfly) | = (Palingenia decolorata) |
| Ephemeroptera (Pale Burrower Mayfly) | Ephoron album |
| Ephemeroptera (Pale Burrower Mayfly) | = (Baetis alba) |
| Ephemeroptera (Pale Burrower Mayfly) | = (Baetis albus) |
| Ephemeroptera (Pale Burrower Mayfly) | = (Palingenia alba) |
| Ephemeroptera (Pale Burrower Mayfly) | = (Polymitarcys albus) |
| Ephemeroptera (Pale Burrower Mayfly) | Ephoron leukon |
| Ephemeroptera (Pale Burrower Mayfly) | Tortopus circumfluus |
| Ephemeroptera (Pale Burrower Mayfly) | Tortopus primus |
| Ephemeroptera (Pale Burrower Mayfly) | = (Campsurus manitobensis) |
| Ephemeroptera (Pale Burrower Mayfly) | = (Campsurus primus) |
| Ephemeroptera (Pale Burrower Mayfly) | = (Tortopus manitobensis) |
| Ephemeroptera (Pale Burrower Mayfly) | Tortopus puella |
| Ephemeroptera (Pale Burrower Mayfly) | = (Campsurus incertus) |
| Ephemeroptera (Pale Burrower Mayfly) | = (Campsurus puella) |
| Ephemeroptera (Pale Burrower Mayfly) | = (Palingenia puella) |
| Ephemeroptera (Pale Burrower Mayfly) | = (Tortopus incertus) |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus amador |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus andersoni |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus bellulus |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus browni |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus celer |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Ameletus alticolus) |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Ameletus celeroides) |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Ameletus tuberculatus) |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus cooki |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus cryptostimulus |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus dissitus |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus doddsianus |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus edmundsi |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus exquisitus |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus falsus |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus imbellis |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus inopinatus |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Ameletus alpinus) |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus lineatus |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus ludens |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus majusculus |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus minimus |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus oregonensis |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus pritchardi |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus quadratus |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus shepherdi |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Ameletus querulus) |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus similior |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Ameletus monta) |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Ameletus montis) |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus sparsatus |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Ameletus aequivocus) |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus subnotatus |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus suffusus |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus tarteri |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus tertius |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus tolae |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus validus |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus vancouverensis |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Ameletus facilis) |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus velox |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Ameletus connectina) |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Ameletus connectinus) |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Ameletus connectus) |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus vernalis |
| Ephemeroptera (Primitive Minnow Mayfly) | Ameletus walleyi |
| Ephemeroptera (Primitive Minnow Mayfly) | Edmundsius agilis |
| Ephemeroptera (Primitive Minnow Mayfly) | Parameletus chelifer |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Sparrea norvegica) |
| Ephemeroptera (Primitive Minnow Mayfly) | Parameletus columbiae |
| Ephemeroptera (Primitive Minnow Mayfly) | Parameletus croesus |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Siphlonuroides croesus) |
| Ephemeroptera (Primitive Minnow Mayfly) | Parameletus midas |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Siphlonuroides midas) |
| Ephemeroptera (Primitive Minnow Mayfly) | Siphlonisca aerodromia |
| Ephemeroptera (Primitive Minnow Mayfly) | Siphlonurus alternatus |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Baetis alternata) |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Baetis alternatus) |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Baetis annulata) |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Baetis annulatus) |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Baetis femorata) |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Siphlurella alternata) |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Siphlurus alternans) |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Siphlurus alternatus) |
| Ephemeroptera (Primitive Minnow Mayfly) | Siphlonurus autumnalis |
| Ephemeroptera (Primitive Minnow Mayfly) | Siphlonurus barbaroides |
| Ephemeroptera (Primitive Minnow Mayfly) | Siphlonurus barbarus |
| Ephemeroptera (Primitive Minnow Mayfly) | Siphlonurus columbianus |
| Ephemeroptera (Primitive Minnow Mayfly) | Siphlonurus decorus |
| Ephemeroptera (Primitive Minnow Mayfly) | Siphlonurus demaryi |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Baetis luridipennis) |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Ecdyurus luridipennis) |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Heptagenia luridipennis) |
| Ephemeroptera (Primitive Minnow Mayfly) | Siphlonurus marginatus |
| Ephemeroptera (Primitive Minnow Mayfly) | Siphlonurus marshalli |
| Ephemeroptera (Primitive Minnow Mayfly) | Siphlonurus minnoi |
| Ephemeroptera (Primitive Minnow Mayfly) | Siphlonurus mirus |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Siphlurus mirus) |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Baetis noveboracana) |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Ephemera noveboracana) |
| Ephemeroptera (Primitive Minnow Mayfly) | Siphlonurus occidentalis |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Siphlonurus inflatus) |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Siphlurella occidentalis) |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Siphlurus occidentalis) |
| Ephemeroptera (Primitive Minnow Mayfly) | Siphlonurus phyllis |
| Ephemeroptera (Primitive Minnow Mayfly) | Siphlonurus quebecensis |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Baetis canadensis) |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Siphlonurus triangularis) |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Siphlurus quebecensis) |
| Ephemeroptera (Primitive Minnow Mayfly) | Siphlonurus rapidus |
| Ephemeroptera (Primitive Minnow Mayfly) | Siphlonurus securifer |
| Ephemeroptera (Primitive Minnow Mayfly) | Siphlonurus spectabilis |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Siphlonurus maria) |
| Ephemeroptera (Primitive Minnow Mayfly) | Siphlonurus typicus |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Siphlonurus berenice) |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Siphlonurus bernice) |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Siphlonurus novangliae) |
| Ephemeroptera (Primitive Minnow Mayfly) | = (Siphlurus typicus) |
| Ephemeroptera (Pronggill Mayfly) | Choroterpes albiannulata |
| Ephemeroptera (Pronggill Mayfly) | Choroterpes basalis |
| Ephemeroptera (Pronggill Mayfly) | = (Choroterpes ferruginea) |
| Ephemeroptera (Pronggill Mayfly) | = (Choroterpes fusca) |
| Ephemeroptera (Pronggill Mayfly) | = (Choroterpes hubbelli) |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia basalis) |
| Ephemeroptera (Pronggill Mayfly) | Choroterpes inornata |
| Ephemeroptera (Pronggill Mayfly) | = (Choroterpes oaxacaensis) |
| Ephemeroptera (Pronggill Mayfly) | Choroterpes terratoma |
| Ephemeroptera (Pronggill Mayfly) | Choroterpes ungulus |
| Ephemeroptera (Pronggill Mayfly) | Farrodes maya |
| Ephemeroptera (Pronggill Mayfly) | Farrodes mexicanus |
| Ephemeroptera (Pronggill Mayfly) | Farrodes otiesa |
| Ephemeroptera (Pronggill Mayfly) | Farrodes reevesi |
| Ephemeroptera (Pronggill Mayfly) | Farrodes texanus |
| Ephemeroptera (Pronggill Mayfly) | Farrodes tulija |
| Ephemeroptera (Pronggill Mayfly) | Habrophlebia vibrans |
| Ephemeroptera (Pronggill Mayfly) | = (Habrophlebia jocosa) |
| Ephemeroptera (Pronggill Mayfly) | = (Habrophlebia pusilla) |
| Ephemeroptera (Pronggill Mayfly) | Habrophlebiodes americana |
| Ephemeroptera (Pronggill Mayfly) | = (Choroterpes betteni) |
| Ephemeroptera (Pronggill Mayfly) | = (Habrophlebia americana) |
| Ephemeroptera (Pronggill Mayfly) | = (Habrophlebiodes betteni) |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia betteni) |
| Ephemeroptera (Pronggill Mayfly) | Habrophlebiodes annulata |
| Ephemeroptera (Pronggill Mayfly) | Habrophlebiodes brunneipennis |
| Ephemeroptera (Pronggill Mayfly) | Habrophlebiodes celeteria |
| Ephemeroptera (Pronggill Mayfly) | Hydrosmilodon primanus |
| Ephemeroptera (Pronggill Mayfly) | = (Thraulus primanus) |
| Ephemeroptera (Pronggill Mayfly) | = (Traverella primana) |
| Ephemeroptera (Pronggill Mayfly) | = (Traverella primanus) |
| Ephemeroptera (Pronggill Mayfly) | Leptophlebia bradleyi |
| Ephemeroptera (Pronggill Mayfly) | = (Paraleptophlebia bradleyi) |
| Ephemeroptera (Pronggill Mayfly) | Leptophlebia cupida |
| Ephemeroptera (Pronggill Mayfly) | = (Baetis ignava) |
| Ephemeroptera (Pronggill Mayfly) | = (Blasturus austrinus) |
| Ephemeroptera (Pronggill Mayfly) | = (Blasturus collinus) |
| Ephemeroptera (Pronggill Mayfly) | = (Blasturus concinnus) |
| Ephemeroptera (Pronggill Mayfly) | = (Blasturus cupidus) |
| Ephemeroptera (Pronggill Mayfly) | = (Blasturus gravastellus) |
| Ephemeroptera (Pronggill Mayfly) | = (Cloe quebecensis) |
| Ephemeroptera (Pronggill Mayfly) | = (Ephemera cupida) |
| Ephemeroptera (Pronggill Mayfly) | = (Ephemera hebes) |
| Ephemeroptera (Pronggill Mayfly) | = (Ephemerella quebecensis) |
| Ephemeroptera (Pronggill Mayfly) | = (Heptagenia quebecensis) |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia austrina) |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia collina) |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia concinna) |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia gravastella) |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia hebes) |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia ignava) |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia pallipes) |
| Ephemeroptera (Pronggill Mayfly) | = (Palingenia concinna) |
| Ephemeroptera (Pronggill Mayfly) | = (Palingenia pallipes) |
| Ephemeroptera (Pronggill Mayfly) | = (Potamanthus concinnus) |
| Ephemeroptera (Pronggill Mayfly) | = (Potamanthus cupidus) |
| Ephemeroptera (Pronggill Mayfly) | Leptophlebia intermedia |
| Ephemeroptera (Pronggill Mayfly) | = (Blasturus grandis) |
| Ephemeroptera (Pronggill Mayfly) | = (Blasturus intermedius) |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia grandis) |
| Ephemeroptera (Pronggill Mayfly) | Leptophlebia johnsoni |
| Ephemeroptera (Pronggill Mayfly) | = (Blasturus gracilis) |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia gracilis) |
| Ephemeroptera (Pronggill Mayfly) | Leptophlebia konza |
| Ephemeroptera (Pronggill Mayfly) | Leptophlebia nebulosa |
| Ephemeroptera (Pronggill Mayfly) | = (Blasturus nebulosus) |
| Ephemeroptera (Pronggill Mayfly) | = (Palingenia nebulosa) |
| Ephemeroptera (Pronggill Mayfly) | = (Potamanthus nebulosus) |
| Ephemeroptera (Pronggill Mayfly) | = (Potamanthus odonatus) |
| Ephemeroptera (Pronggill Mayfly) | Leptophlebia pacifica |
| Ephemeroptera (Pronggill Mayfly) | = (Blasturus pacificus) |
| Ephemeroptera (Pronggill Mayfly) | = (Blasturus vibex) |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia vibex) |
| Ephemeroptera (Pronggill Mayfly) | Neochoroterpes kossi |
| Ephemeroptera (Pronggill Mayfly) | = (Choroterpes kossi) |
| Ephemeroptera (Pronggill Mayfly) | Neochoroterpes nanita |
| Ephemeroptera (Pronggill Mayfly) | = (Choroterpes crocatus) |
| Ephemeroptera (Pronggill Mayfly) | = (Choroterpes manita) |
| Ephemeroptera (Pronggill Mayfly) | = (Choroterpes nanita) |
| Ephemeroptera (Pronggill Mayfly) | = (Neochoroterpes crocatus) |
| Ephemeroptera (Pronggill Mayfly) | Neochoroterpes oklahoma |
| Ephemeroptera (Pronggill Mayfly) | = (Choroterpes mexicana) |
| Ephemeroptera (Pronggill Mayfly) | = (Choroterpes mexicanus) |
| Ephemeroptera (Pronggill Mayfly) | = (Choroterpes oklahoma) |
| Ephemeroptera (Pronggill Mayfly) | Neochoroterpes orientalis |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia adoptiva |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia adoptiva) |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia altana |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia aquilina |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia assimilis |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia assimilis) |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia associata |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia associata) |
| Ephemeroptera (Pronggill Mayfly) | = (Paraleptophlebia compar) |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia bicornuta |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia bicornuta) |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia brunneipennis |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia brunneipennis) |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia cachea |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia calcarica |
| Ephemeroptera (Pronggill Mayfly) | = (Paraleptophlebia calcarica) |
| Ephemeroptera (Pronggill Mayfly) | = (Paraleptophlebia calcarita) |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia californica |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia clara |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia clara) |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia debilis |
| Ephemeroptera (Pronggill Mayfly) | = (Baetis debilis) |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia debilis) |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia mollis) |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia separata) |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia falcula |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia georgiana |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia gregalis |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia gregalis) |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia invalida) |
| Ephemeroptera (Pronggill Mayfly) | = (Paraleptophlebia invalida) |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia guttata |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia guttata) |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia helena |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia heteronea |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia heteronea) |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia jeanae |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia jenseni |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia kirchneri |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia memorialis |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia memorialis) |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia pallipes) |
| Ephemeroptera (Pronggill Mayfly) | = (Paraleptophlebia pallipes) |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia moerens |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia moerens) |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia mollis |
| Ephemeroptera (Pronggill Mayfly) | = (Cloe mollis) |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia mollis) |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia mollis) |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia ontario |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia ontario) |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia packii |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia packii) |
| Ephemeroptera (Pronggill Mayfly) | = (Paraleptophlebia packi) |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia placeri |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia praepedita |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia praepedita) |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia quisquilia |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia rufivenosa |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia rufivenosa) |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia sculleni |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia sticta |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia strigula |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia strigula) |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia swannanoa |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia swannanoa) |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia temporalis |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia temporalis) |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia traverae |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia vaciva |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia vaciva) |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia volitans |
| Ephemeroptera (Pronggill Mayfly) | = (Leptophlebia volitans) |
| Ephemeroptera (Pronggill Mayfly) | Paraleptophlebia zayante |
| Ephemeroptera (Pronggill Mayfly) | Thraulodes brunneus |
| Ephemeroptera (Pronggill Mayfly) | Thraulodes cryptodrilus |
| Ephemeroptera (Pronggill Mayfly) | Thraulodes eccentricus |
| Ephemeroptera (Pronggill Mayfly) | Thraulodes ephippiatus |
| Ephemeroptera (Pronggill Mayfly) | Thraulodes gonzalesi |
| Ephemeroptera (Pronggill Mayfly) | = (Thraulodes salinus) |
| Ephemeroptera (Pronggill Mayfly) | Thraulodes hilaris |
| Ephemeroptera (Pronggill Mayfly) | = (Thraulus hilaris) |
| Ephemeroptera (Pronggill Mayfly) | Thraulodes humeralis |
| Ephemeroptera (Pronggill Mayfly) | Thraulodes lunatus |
| Ephemeroptera (Pronggill Mayfly) | Thraulodes mexicanus |
| Ephemeroptera (Pronggill Mayfly) | = (Thraulus mexicanus) |
| Ephemeroptera (Pronggill Mayfly) | Thraulodes packeri |
| Ephemeroptera (Pronggill Mayfly) | Thraulodes spangleri |
| Ephemeroptera (Pronggill Mayfly) | Thraulodes speciosus |
| Ephemeroptera (Pronggill Mayfly) | = (Thraulodes arizonicus) |
| Ephemeroptera (Pronggill Mayfly) | Thraulodes tenulineus |
| Ephemeroptera (Pronggill Mayfly) | Thraulodes zonalis |
| Ephemeroptera (Pronggill Mayfly) | Traverella albertana |
| Ephemeroptera (Pronggill Mayfly) | = (Thraulus albertanus) |
| Ephemeroptera (Pronggill Mayfly) | = (Traverella castanea) |
| Ephemeroptera (Pronggill Mayfly) | Traverella lewisi |
| Ephemeroptera (Pronggill Mayfly) | Traverella longifrons |
| Ephemeroptera (Pronggill Mayfly) | Traverella presidiana |
| Ephemeroptera (Pronggill Mayfly) | = (Thraulus presidianus) |
| Ephemeroptera (Pronggill Mayfly) | Traverella promifrons |
| Ephemeroptera (Pronggill Mayfly) | Traverella sallei |
| Ephemeroptera (Pronggill Mayfly) | = (Thraulus sallei) |
| Ephemeroptera (Riverbed Burrower Mayfly) | Pentagenia vittigera |
| Ephemeroptera (Riverbed Burrower Mayfly) | = (Palingenia vittigera) |
| Ephemeroptera (Riverbed Burrower Mayfly) | = (Pentagenia quadripunctata) |
| Ephemeroptera (Sand Burrower Mayfly) | Euthyplocia hecuba |
| Ephemeroptera (Sand Burrower Mayfly) | = (Palingenia hecuba) |
| Ephemeroptera (Sand Minnow Mayfly) | Acanthametropus pecatonica |
| Ephemeroptera (Sand Minnow Mayfly) | = (Metreturus pecatonica) |
| Ephemeroptera (Sand Minnow Mayfly) | Ametropus ammophilus |
| Ephemeroptera (Sand Minnow Mayfly) | Ametropus neavei |
| Ephemeroptera (Sand Minnow Mayfly) | = (Ametropus albrighti) |
| Ephemeroptera (Sand Minnow Mayfly) | Analetris eximia |
| Ephemeroptera (Small Minnow Mayfly) | Acentrella alachua |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis alachua) |
| Ephemeroptera (Small Minnow Mayfly) | = (Plauditus alachua) |
| Ephemeroptera (Small Minnow Mayfly) | = (Pseudocloeon alachua) |
| Ephemeroptera (Small Minnow Mayfly) | Acentrella barbarae |
| Ephemeroptera (Small Minnow Mayfly) | Acentrella feropagus |
| Ephemeroptera (Small Minnow Mayfly) | = (Acentrella lapponica) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis lapponicus) |
| Ephemeroptera (Small Minnow Mayfly) | Acentrella insignificans |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis insignificans) |
| Ephemeroptera (Small Minnow Mayfly) | Acentrella lapponica |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis lapponicus) |
| Ephemeroptera (Small Minnow Mayfly) | Acentrella nadineae |
| Ephemeroptera (Small Minnow Mayfly) | Acentrella parvula |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis armillatus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Plauditus armillatus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Plauditus parvulus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Pseudocloeon parvulum) |
| Ephemeroptera (Small Minnow Mayfly) | Acentrella turbida |
| Ephemeroptera (Small Minnow Mayfly) | = (Acentrella carolina) |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloeon carolina) |
| Ephemeroptera (Small Minnow Mayfly) | = (Pseudocloeon carolina) |
| Ephemeroptera (Small Minnow Mayfly) | = (Pseudocloeon turbidum) |
| Ephemeroptera (Small Minnow Mayfly) | Acerpenna akataleptos |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis akataleptos) |
| Ephemeroptera (Small Minnow Mayfly) | Acerpenna macdunnoughi |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis macdunnoughi) |
| Ephemeroptera (Small Minnow Mayfly) | Acerpenna pygmaea |
| Ephemeroptera (Small Minnow Mayfly) | = (Acerpenna harti) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis harti) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis pygmaeus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis spiethi) |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloe pygmaea) |
| Ephemeroptera (Small Minnow Mayfly) | Americabaetis intermedius |
| Ephemeroptera (Small Minnow Mayfly) | = (Acerpenna intermedia) |
| Ephemeroptera (Small Minnow Mayfly) | Americabaetis lugoi |
| Ephemeroptera (Small Minnow Mayfly) | Americabaetis pleturus |
| Ephemeroptera (Small Minnow Mayfly) | = (Acerpenna pletura) |
| Ephemeroptera (Small Minnow Mayfly) | Apobaetis etowah |
| Ephemeroptera (Small Minnow Mayfly) | = (Apobaetis indeprensus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Pseudocloeon etowah) |
| Ephemeroptera (Small Minnow Mayfly) | Apobaetis futilis |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis futile) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis futilis) |
| Ephemeroptera (Small Minnow Mayfly) | = (Plauditus futilis) |
| Ephemeroptera (Small Minnow Mayfly) | = (Pseudocloeon futile) |
| Ephemeroptera (Small Minnow Mayfly) | Apobaetis lakota |
| Ephemeroptera (Small Minnow Mayfly) | Baetis adonis |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis caelestis) |
| Ephemeroptera (Small Minnow Mayfly) | Baetis alius |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis moqui) |
| Ephemeroptera (Small Minnow Mayfly) | Baetis bicaudatus |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis minimus) |
| Ephemeroptera (Small Minnow Mayfly) | Baetis brunneicolor |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis anachris) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis hiemalis) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis phyllis) |
| Ephemeroptera (Small Minnow Mayfly) | Baetis bundyae |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis bundyi) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis macani bundyae) |
| Ephemeroptera (Small Minnow Mayfly) | Baetis diablus |
| Ephemeroptera (Small Minnow Mayfly) | Baetis flavistriga |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis caurinus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis cingulatus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis levitans) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis nanus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis ochris) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis pallidula) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis pallidulus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis phoebus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis quebecensis) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis sinuosus) |
| Ephemeroptera (Small Minnow Mayfly) | Baetis foemina |
| Ephemeroptera (Small Minnow Mayfly) | Baetis hudsonicus |
| Ephemeroptera (Small Minnow Mayfly) | Baetis intercalaris |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis lasallei) |
| Ephemeroptera (Small Minnow Mayfly) | Baetis magnus |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis libos) |
| Ephemeroptera (Small Minnow Mayfly) | Baetis notos |
| Ephemeroptera (Small Minnow Mayfly) | Baetis palisadi |
| Ephemeroptera (Small Minnow Mayfly) | Baetis persecutor |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis persecuta) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis persecutus) |
| Ephemeroptera (Small Minnow Mayfly) | Baetis piscatoris |
| Ephemeroptera (Small Minnow Mayfly) | Baetis pluto |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloe posticata) |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloeon posticata) |
| Ephemeroptera (Small Minnow Mayfly) | Baetis rusticans |
| Ephemeroptera (Small Minnow Mayfly) | Baetis tricaudatus |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis incertans) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis intermedius) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis jesmondensis) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis moffati) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis moffatti) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis parallelus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis vagans) |
| Ephemeroptera (Small Minnow Mayfly) | Baetodes adustus |
| Ephemeroptera (Small Minnow Mayfly) | Baetodes alleni |
| Ephemeroptera (Small Minnow Mayfly) | Baetodes arizonensis |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetodes sigillatus) |
| Ephemeroptera (Small Minnow Mayfly) | Baetodes bibranchius |
| Ephemeroptera (Small Minnow Mayfly) | Baetodes caritus |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetodes veracrusensis) |
| Ephemeroptera (Small Minnow Mayfly) | Baetodes deficiens |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetodes bellus) |
| Ephemeroptera (Small Minnow Mayfly) | Baetodes edmundsi |
| Ephemeroptera (Small Minnow Mayfly) | Baetodes fortinensis |
| Ephemeroptera (Small Minnow Mayfly) | Baetodes fuscipes |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetodes furvus) |
| Ephemeroptera (Small Minnow Mayfly) | Baetodes inermis |
| Ephemeroptera (Small Minnow Mayfly) | Baetodes longus |
| Ephemeroptera (Small Minnow Mayfly) | Baetodes obesus |
| Ephemeroptera (Small Minnow Mayfly) | Baetodes pallidus |
| Ephemeroptera (Small Minnow Mayfly) | Baetodes pictus |
| Ephemeroptera (Small Minnow Mayfly) | Baetodes tritus |
| Ephemeroptera (Small Minnow Mayfly) | Baetodes velmae |
| Ephemeroptera (Small Minnow Mayfly) | Baetopus trishae |
| Ephemeroptera (Small Minnow Mayfly) | Barbaetis benfieldi |
| Ephemeroptera (Small Minnow Mayfly) | Callibaetis californicus |
| Ephemeroptera (Small Minnow Mayfly) | Callibaetis distinctus |
| Ephemeroptera (Small Minnow Mayfly) | Callibaetis ferrugineus ferrugineus |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis ferrugineus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Callibaetis ferrugineus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloe ferruginea) |
| Ephemeroptera (Small Minnow Mayfly) | Callibaetis ferrugineus hageni |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis tessellata) |
| Ephemeroptera (Small Minnow Mayfly) | = (Callibaetis americanus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Callibaetis carolus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Callibaetis coloradensis) |
| Ephemeroptera (Small Minnow Mayfly) | = (Callibaetis evergreenensis) |
| Ephemeroptera (Small Minnow Mayfly) | = (Callibaetis fusca) |
| Ephemeroptera (Small Minnow Mayfly) | = (Callibaetis fuscus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Callibaetis hageni) |
| Ephemeroptera (Small Minnow Mayfly) | = (Callibaetis hebes) |
| Ephemeroptera (Small Minnow Mayfly) | = (Callibaetis nigritus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Callibaetis tessellatus) |
| Ephemeroptera (Small Minnow Mayfly) | Callibaetis floridanus |
| Ephemeroptera (Small Minnow Mayfly) | = (Callibaetis completa) |
| Ephemeroptera (Small Minnow Mayfly) | Callibaetis fluctuans |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis fluctuans) |
| Ephemeroptera (Small Minnow Mayfly) | = (Callibaetis traverae) |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloe fluctuans) |
| Ephemeroptera (Small Minnow Mayfly) | Callibaetis montanus |
| Ephemeroptera (Small Minnow Mayfly) | = (Callibaetis montanus montanus) |
| Ephemeroptera (Small Minnow Mayfly) | Callibaetis pallidus |
| Ephemeroptera (Small Minnow Mayfly) | = (Callibaetis semicostatus) |
| Ephemeroptera (Small Minnow Mayfly) | Callibaetis pictus |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis pictus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Callibaetis centralis) |
| Ephemeroptera (Small Minnow Mayfly) | = (Callibaetis doddsi) |
| Ephemeroptera (Small Minnow Mayfly) | = (Callibaetis pacificus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Callibaetis signatus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Callibaetis vitrea) |
| Ephemeroptera (Small Minnow Mayfly) | Callibaetis pretiosus |
| Ephemeroptera (Small Minnow Mayfly) | Callibaetis punctilusus |
| Ephemeroptera (Small Minnow Mayfly) | = (Callibaetis montanus punctilusus) |
| Ephemeroptera (Small Minnow Mayfly) | Callibaetis skokianus |
| Ephemeroptera (Small Minnow Mayfly) | = (Callibaetis brevicostatus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloe undata) |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloeon undata) |
| Ephemeroptera (Small Minnow Mayfly) | Camelobaetidius arriaga |
| Ephemeroptera (Small Minnow Mayfly) | = (Camelobaetidius chiapas) |
| Ephemeroptera (Small Minnow Mayfly) | = (Camelobaetidius jenseni) |
| Ephemeroptera (Small Minnow Mayfly) | = (Dactylobaetis arriaga) |
| Ephemeroptera (Small Minnow Mayfly) | = (Dactylobaetis chiapas) |
| Ephemeroptera (Small Minnow Mayfly) | = (Dactylobaetis jenseni) |
| Ephemeroptera (Small Minnow Mayfly) | Camelobaetidius kickapoo |
| Ephemeroptera (Small Minnow Mayfly) | Camelobaetidius maidu |
| Ephemeroptera (Small Minnow Mayfly) | Camelobaetidius mexicanus |
| Ephemeroptera (Small Minnow Mayfly) | = (Dactylobaetis mexicanus) |
| Ephemeroptera (Small Minnow Mayfly) | Camelobaetidius musseri |
| Ephemeroptera (Small Minnow Mayfly) | = (Camelobaetidius salinus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Camelobaetidius sinaloa) |
| Ephemeroptera (Small Minnow Mayfly) | = (Dactylobaetis musseri) |
| Ephemeroptera (Small Minnow Mayfly) | = (Dactylobaetis salinus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Dactylobaetis sinaloa) |
| Ephemeroptera (Small Minnow Mayfly) | Camelobaetidius shepardi |
| Ephemeroptera (Small Minnow Mayfly) | Camelobaetidius variabilis |
| Ephemeroptera (Small Minnow Mayfly) | Camelobaetidius waltzi |
| Ephemeroptera (Small Minnow Mayfly) | Camelobaetidius warreni |
| Ephemeroptera (Small Minnow Mayfly) | = (Camelobaetidius cepheus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Camelobaetidius navis) |
| Ephemeroptera (Small Minnow Mayfly) | = (Camelobaetidius similis) |
| Ephemeroptera (Small Minnow Mayfly) | = (Camelobaetidius trivialis) |
| Ephemeroptera (Small Minnow Mayfly) | = (Camelobaetidius zenobia) |
| Ephemeroptera (Small Minnow Mayfly) | = (Dactylobaetis cepheus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Dactylobaetis navis) |
| Ephemeroptera (Small Minnow Mayfly) | = (Dactylobaetis trivialis) |
| Ephemeroptera (Small Minnow Mayfly) | = (Dactylobaetis warreni) |
| Ephemeroptera (Small Minnow Mayfly) | = (Dactylobaetis zenobia) |
| Ephemeroptera (Small Minnow Mayfly) | Centroptilum alamance |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloeon alamance) |
| Ephemeroptera (Small Minnow Mayfly) | = (Neocloeon alamance) |
| Ephemeroptera (Small Minnow Mayfly) | Centroptilum album |
| Ephemeroptera (Small Minnow Mayfly) | = (Centroptilum convexum) |
| Ephemeroptera (Small Minnow Mayfly) | = (Centroptilum walshi) |
| Ephemeroptera (Small Minnow Mayfly) | = (Procloeon album) |
| Ephemeroptera (Small Minnow Mayfly) | = (Procloeon convexum) |
| Ephemeroptera (Small Minnow Mayfly) | = (Procloeon walshi) |
| Ephemeroptera (Small Minnow Mayfly) | Centroptilum asperatum |
| Ephemeroptera (Small Minnow Mayfly) | = (Centroptilum elsa) |
| Ephemeroptera (Small Minnow Mayfly) | = (Centroptilum oreophilum) |
| Ephemeroptera (Small Minnow Mayfly) | = (Procloeon asperatum) |
| Ephemeroptera (Small Minnow Mayfly) | = (Procloeon elsa) |
| Ephemeroptera (Small Minnow Mayfly) | = (Procloeon oreophilum) |
| Ephemeroptera (Small Minnow Mayfly) | Centroptilum bifurcatum |
| Ephemeroptera (Small Minnow Mayfly) | = (Centroptilum selanderorum) |
| Ephemeroptera (Small Minnow Mayfly) | Centroptilum conturbatum |
| Ephemeroptera (Small Minnow Mayfly) | = (Procloeon conturbatum) |
| Ephemeroptera (Small Minnow Mayfly) | Centroptilum minor |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloeon minor) |
| Ephemeroptera (Small Minnow Mayfly) | = (Procloeon minor) |
| Ephemeroptera (Small Minnow Mayfly) | Centroptilum ozarkensum |
| Ephemeroptera (Small Minnow Mayfly) | Centroptilum semirufum |
| Ephemeroptera (Small Minnow Mayfly) | Centroptilum triangulifer |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloeon triangulifer) |
| Ephemeroptera (Small Minnow Mayfly) | Centroptilum victoriae |
| Ephemeroptera (Small Minnow Mayfly) | Cloeodes excogitatus |
| Ephemeroptera (Small Minnow Mayfly) | Cloeodes macrolamellus |
| Ephemeroptera (Small Minnow Mayfly) | Cloeodes peninsulus |
| Ephemeroptera (Small Minnow Mayfly) | Cloeodes waltzi |
| Ephemeroptera (Small Minnow Mayfly) | Cloeon dipterum |
| Ephemeroptera (Small Minnow Mayfly) | = (Chloeon dipterum) |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloe diptera) |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloeon cognatum) |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloeon inscriptum) |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloeon pallida) |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloeopsis diptera) |
| Ephemeroptera (Small Minnow Mayfly) | = (Ephemera diptera) |
| Ephemeroptera (Small Minnow Mayfly) | Diphetor hageni |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis devinctus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis hageni) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis herodes) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis parvus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis unicolor) |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloe unicolor) |
| Ephemeroptera (Small Minnow Mayfly) | = (Diphetor devinctus) |
| Ephemeroptera (Small Minnow Mayfly) | Fallceon eatoni |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis eatoni) |
| Ephemeroptera (Small Minnow Mayfly) | Fallceon fortipalpus |
| Ephemeroptera (Small Minnow Mayfly) | Fallceon quilleri |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis buenoi) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis byblis) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis cleptis) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis endymion) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis erebus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis leechi) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis quilleri) |
| Ephemeroptera (Small Minnow Mayfly) | = (Fallceon buenoi) |
| Ephemeroptera (Small Minnow Mayfly) | = (Fallceon byblis) |
| Ephemeroptera (Small Minnow Mayfly) | Fallceon sageae |
| Ephemeroptera (Small Minnow Mayfly) | Fallceon sonora |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis sonora) |
| Ephemeroptera (Small Minnow Mayfly) | Fallceon thermophilos |
| Ephemeroptera (Small Minnow Mayfly) | = (Acerpenna sulfurosa) |
| Ephemeroptera (Small Minnow Mayfly) | = (Acerpenna sulfurosus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Acerpenna thermophilos) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis sulfurosus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis thermophilos) |
| Ephemeroptera (Small Minnow Mayfly) | = (Fallceon sulfurosus) |
| Ephemeroptera (Small Minnow Mayfly) | Heterocloeon amplum |
| Ephemeroptera (Small Minnow Mayfly) | = (Acentrella ampla) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis amplus) |
| Ephemeroptera (Small Minnow Mayfly) | Heterocloeon berneri |
| Ephemeroptera (Small Minnow Mayfly) | = (Rheobaetis berneri) |
| Ephemeroptera (Small Minnow Mayfly) | Heterocloeon curiosum |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis curiosus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Centroptilum curiosum) |
| Ephemeroptera (Small Minnow Mayfly) | = (Rheobaetis traverae) |
| Ephemeroptera (Small Minnow Mayfly) | Heterocloeon frivolum |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis frivolus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Heterocloeon frivolus) |
| Ephemeroptera (Small Minnow Mayfly) | Heterocloeon grande |
| Ephemeroptera (Small Minnow Mayfly) | = (Plauditus grandis) |
| Ephemeroptera (Small Minnow Mayfly) | Heterocloeon petersi |
| Ephemeroptera (Small Minnow Mayfly) | = (Rheobaetis petersi) |
| Ephemeroptera (Small Minnow Mayfly) | Iswaeon anoka |
| Ephemeroptera (Small Minnow Mayfly) | = (Heterocloeon anoka) |
| Ephemeroptera (Small Minnow Mayfly) | = (Pseudocloeon anoka) |
| Ephemeroptera (Small Minnow Mayfly) | = (Pseudocloeon edmundsi) |
| Ephemeroptera (Small Minnow Mayfly) | Iswaeon davidi |
| Ephemeroptera (Small Minnow Mayfly) | = (Heterocloeon davidi) |
| Ephemeroptera (Small Minnow Mayfly) | Iswaeon rubrolaterale |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis rubrolaterale) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis rubrolateralis) |
| Ephemeroptera (Small Minnow Mayfly) | = (Heterocloeon rubrolaterale) |
| Ephemeroptera (Small Minnow Mayfly) | = (Plauditus rubrolateralis) |
| Ephemeroptera (Small Minnow Mayfly) | = (Pseudocloeon rubrolaterale) |
| Ephemeroptera (Small Minnow Mayfly) | Moribaetis macaferti |
| Ephemeroptera (Small Minnow Mayfly) | Moribaetis mimbresaurus |
| Ephemeroptera (Small Minnow Mayfly) | Moribaetis salvini |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis salvini) |
| Ephemeroptera (Small Minnow Mayfly) | Paracloeodes fleeki |
| Ephemeroptera (Small Minnow Mayfly) | Paracloeodes lugoi |
| Ephemeroptera (Small Minnow Mayfly) | Paracloeodes minutus |
| Ephemeroptera (Small Minnow Mayfly) | = (Paracloeodes abditus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Pseudocloeon minutum) |
| Ephemeroptera (Small Minnow Mayfly) | Plauditus bimaculatus |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis bimaculatus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Pseudocloeon bimaculatum) |
| Ephemeroptera (Small Minnow Mayfly) | = (Pseudocloeon bimaculatus) |
| Ephemeroptera (Small Minnow Mayfly) | Plauditus cestus |
| Ephemeroptera (Small Minnow Mayfly) | = (Barbaetis cestus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Pseudocloeon cestum) |
| Ephemeroptera (Small Minnow Mayfly) | Plauditus cingulatus |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis cinctutus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Plauditus cinctutus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Pseudocloeon cingulatum) |
| Ephemeroptera (Small Minnow Mayfly) | Plauditus dubius |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis dubius) |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloe dubia) |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloeon chlorops) |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloeon dubium) |
| Ephemeroptera (Small Minnow Mayfly) | = (Pseudocloeon chlorops) |
| Ephemeroptera (Small Minnow Mayfly) | = (Pseudocloeon dubium) |
| Ephemeroptera (Small Minnow Mayfly) | Plauditus elliotti |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis elliotti) |
| Ephemeroptera (Small Minnow Mayfly) | = (Pseudocloeon elliotti) |
| Ephemeroptera (Small Minnow Mayfly) | = (Pseudocloeon ida) |
| Ephemeroptera (Small Minnow Mayfly) | Plauditus gloveri |
| Ephemeroptera (Small Minnow Mayfly) | Plauditus punctiventris |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis punctiventris) |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloeon punctiventris) |
| Ephemeroptera (Small Minnow Mayfly) | = (Pseudocloeon myrsum) |
| Ephemeroptera (Small Minnow Mayfly) | = (Pseudocloeon punctiventris) |
| Ephemeroptera (Small Minnow Mayfly) | Plauditus texanus |
| Ephemeroptera (Small Minnow Mayfly) | Plauditus veteris |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis veteris) |
| Ephemeroptera (Small Minnow Mayfly) | = (Pseudocloeon veteris) |
| Ephemeroptera (Small Minnow Mayfly) | Plauditus virilis |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis virile) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis virilis) |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloeon virilis) |
| Ephemeroptera (Small Minnow Mayfly) | = (Pseudocloeon virile) |
| Ephemeroptera (Small Minnow Mayfly) | = (Pseudocloeon virilis) |
| Ephemeroptera (Small Minnow Mayfly) | Procloeon bellum |
| Ephemeroptera (Small Minnow Mayfly) | = (Centroptilum bellum) |
| Ephemeroptera (Small Minnow Mayfly) | Procloeon caliginosum |
| Ephemeroptera (Small Minnow Mayfly) | = (Centroptilum caliginosum) |
| Ephemeroptera (Small Minnow Mayfly) | Procloeon fragile |
| Ephemeroptera (Small Minnow Mayfly) | = (Centroptilum fragile) |
| Ephemeroptera (Small Minnow Mayfly) | Procloeon inanum |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloeon inanum) |
| Ephemeroptera (Small Minnow Mayfly) | Procloeon ingens |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloeon implicatum) |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloeon ingens) |
| Ephemeroptera (Small Minnow Mayfly) | = (Procloeon implicatum) |
| Ephemeroptera (Small Minnow Mayfly) | Procloeon insignificans |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloeon insignificans) |
| Ephemeroptera (Small Minnow Mayfly) | Procloeon intermediale |
| Ephemeroptera (Small Minnow Mayfly) | = (Centroptilum intermediale) |
| Ephemeroptera (Small Minnow Mayfly) | Procloeon mendax |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloe mendax) |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloeon mendax) |
| Ephemeroptera (Small Minnow Mayfly) | Procloeon nelsoni |
| Ephemeroptera (Small Minnow Mayfly) | Procloeon ozburni |
| Ephemeroptera (Small Minnow Mayfly) | = (Centroptilum ozburni) |
| Ephemeroptera (Small Minnow Mayfly) | Procloeon pennulatum |
| Ephemeroptera (Small Minnow Mayfly) | = (Centroptilum infrequens) |
| Ephemeroptera (Small Minnow Mayfly) | = (Centroptilum pennulatum) |
| Ephemeroptera (Small Minnow Mayfly) | = (Pseudocentroptilum pennulatum) |
| Ephemeroptera (Small Minnow Mayfly) | Procloeon quaesitum |
| Ephemeroptera (Small Minnow Mayfly) | = (Centroptilum quaesitum) |
| Ephemeroptera (Small Minnow Mayfly) | Procloeon rivulare |
| Ephemeroptera (Small Minnow Mayfly) | = (Centroptilum rivulare) |
| Ephemeroptera (Small Minnow Mayfly) | Procloeon rubropictum |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloeon rubropictum) |
| Ephemeroptera (Small Minnow Mayfly) | Procloeon rufostrigatum |
| Ephemeroptera (Small Minnow Mayfly) | = (Centroptilum bistrigatum) |
| Ephemeroptera (Small Minnow Mayfly) | = (Centroptilum hobbsi) |
| Ephemeroptera (Small Minnow Mayfly) | = (Centroptilum rufostrigatum) |
| Ephemeroptera (Small Minnow Mayfly) | = (Procloeon hobbsi) |
| Ephemeroptera (Small Minnow Mayfly) | Procloeon simile |
| Ephemeroptera (Small Minnow Mayfly) | = (Centroptilum simile) |
| Ephemeroptera (Small Minnow Mayfly) | = (Centroptilum similie) |
| Ephemeroptera (Small Minnow Mayfly) | Procloeon simplex |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloeon simplex) |
| Ephemeroptera (Small Minnow Mayfly) | Procloeon texanum |
| Ephemeroptera (Small Minnow Mayfly) | = (Procloeon distinctum) |
| Ephemeroptera (Small Minnow Mayfly) | Procloeon venosum |
| Ephemeroptera (Small Minnow Mayfly) | = (Centroptilum venosum) |
| Ephemeroptera (Small Minnow Mayfly) | Procloeon vicinum |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloe vicina) |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloeon vicinum) |
| Ephemeroptera (Small Minnow Mayfly) | Procloeon viridoculare |
| Ephemeroptera (Small Minnow Mayfly) | = (Centroptilum viridocularis) |
| Ephemeroptera (Small Minnow Mayfly) | = (Procloeon irrubrum) |
| Ephemeroptera (Small Minnow Mayfly) | = (Procloeon viridocularis) |
| Ephemeroptera (Small Minnow Mayfly) | Pseudocentroptiloides morihari |
| Ephemeroptera (Small Minnow Mayfly) | Pseudocentroptiloides usa |
| Ephemeroptera (Small Minnow Mayfly) | Pseudocloeon apache |
| Ephemeroptera (Small Minnow Mayfly) | = (Labiobaetis apache) |
| Ephemeroptera (Small Minnow Mayfly) | Pseudocloeon dardanum |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis dardanus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis elachistus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Labiobaetis dardanus) |
| Ephemeroptera (Small Minnow Mayfly) | Pseudocloeon ephippiatum |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis ephippiatus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Labiobaetis ephippiatus) |
| Ephemeroptera (Small Minnow Mayfly) | Pseudocloeon frondale |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis australis) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis baeticatus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis frondalis) |
| Ephemeroptera (Small Minnow Mayfly) | = (Labiobaetis frondalis) |
| Ephemeroptera (Small Minnow Mayfly) | Pseudocloeon longipalpus |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis longipalpus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Labiobaetis longipalpus) |
| Ephemeroptera (Small Minnow Mayfly) | Pseudocloeon propinquum |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis propinquus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Baetis spinosus) |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloe propinqua) |
| Ephemeroptera (Small Minnow Mayfly) | = (Cloe vicina) |
| Ephemeroptera (Small Minnow Mayfly) | = (Labiobaetis propinquus) |
| Ephemeroptera (Small Minnow Mayfly) | Varipes lasiobrachius |
| Ephemeroptera (Small Squaregill Mayfly) | Amercaenis cusabo |
| Ephemeroptera (Small Squaregill Mayfly) | Amercaenis ridens |
| Ephemeroptera (Small Squaregill Mayfly) | = (Caenis ridens) |
| Ephemeroptera (Small Squaregill Mayfly) | Brachycercus berneri |
| Ephemeroptera (Small Squaregill Mayfly) | = (Brachycercus floridicola) |
| Ephemeroptera (Small Squaregill Mayfly) | Brachycercus harrisella |
| Ephemeroptera (Small Squaregill Mayfly) | = (Brachycercus arcticus) |
| Ephemeroptera (Small Squaregill Mayfly) | = (Brachycercus edmundsi) |
| Ephemeroptera (Small Squaregill Mayfly) | = (Brachycercus magnus) |
| Ephemeroptera (Small Squaregill Mayfly) | = (Brachycercus pallidus) |
| Ephemeroptera (Small Squaregill Mayfly) | = (Brachycercus YUa) |
| Ephemeroptera (Small Squaregill Mayfly) | = (Caenis harrisella) |
| Ephemeroptera (Small Squaregill Mayfly) | = (Caenis pennata) |
| Ephemeroptera (Small Squaregill Mayfly) | = (Eurycaenis harrisella) |
| Ephemeroptera (Small Squaregill Mayfly) | Brachycercus nitidus |
| Ephemeroptera (Small Squaregill Mayfly) | = (Eurycaenis nitida) |
| Ephemeroptera (Small Squaregill Mayfly) | Brachycercus ojibwe |
| Ephemeroptera (Small Squaregill Mayfly) | Caenis amica |
| Ephemeroptera (Small Squaregill Mayfly) | = (Caenis simulans) |
| Ephemeroptera (Small Squaregill Mayfly) | Caenis anceps |
| Ephemeroptera (Small Squaregill Mayfly) | Caenis arwini |
| Ephemeroptera (Small Squaregill Mayfly) | Caenis bajaensis |
| Ephemeroptera (Small Squaregill Mayfly) | Caenis candida |
| Ephemeroptera (Small Squaregill Mayfly) | Caenis diminuta diminuta |
| Ephemeroptera (Small Squaregill Mayfly) | = (Caenis diminuta) |
| Ephemeroptera (Small Squaregill Mayfly) | Caenis eglinensis |
| Ephemeroptera (Small Squaregill Mayfly) | Caenis hilaris |
| Ephemeroptera (Small Squaregill Mayfly) | = (Ephemera hilaris) |
| Ephemeroptera (Small Squaregill Mayfly) | Caenis latipennis |
| Ephemeroptera (Small Squaregill Mayfly) | = (Caenis delicata) |
| Ephemeroptera (Small Squaregill Mayfly) | = (Caenis forcipata) |
| Ephemeroptera (Small Squaregill Mayfly) | = (Caenis gigas) |
| Ephemeroptera (Small Squaregill Mayfly) | = (Caenis jocosa) |
| Ephemeroptera (Small Squaregill Mayfly) | Caenis macafferti |
| Ephemeroptera (Small Squaregill Mayfly) | Caenis punctata |
| Ephemeroptera (Small Squaregill Mayfly) | Caenis tardata |
| Ephemeroptera (Small Squaregill Mayfly) | Caenis youngi |
| Ephemeroptera (Small Squaregill Mayfly) | Cercobrachys cree |
| Ephemeroptera (Small Squaregill Mayfly) | Cercobrachys etowah |
| Ephemeroptera (Small Squaregill Mayfly) | Cercobrachys fox |
| Ephemeroptera (Small Squaregill Mayfly) | Cercobrachys lilliei |
| Ephemeroptera (Small Squaregill Mayfly) | Cercobrachys pomeiok |
| Ephemeroptera (Small Squaregill Mayfly) | Cercobrachys serpentis |
| Ephemeroptera (Small Squaregill Mayfly) | Cercobrachys winnebago |
| Ephemeroptera (Small Squaregill Mayfly) | Latineosus cibola |
| Ephemeroptera (Small Squaregill Mayfly) | Sparbarus choctaw |
| Ephemeroptera (Small Squaregill Mayfly) | Sparbarus coushatta |
| Ephemeroptera (Small Squaregill Mayfly) | = (Brachycercus flavus) |
| Ephemeroptera (Small Squaregill Mayfly) | Sparbarus lacustris |
| Ephemeroptera (Small Squaregill Mayfly) | = (Brachycercus idei) |
| Ephemeroptera (Small Squaregill Mayfly) | = (Brachycercus lacustris) |
| Ephemeroptera (Small Squaregill Mayfly) | = (Brachycercus pallidus) |
| Ephemeroptera (Small Squaregill Mayfly) | = (Caenis lacustris) |
| Ephemeroptera (Small Squaregill Mayfly) | = (Eurycaenis idei) |
| Ephemeroptera (Small Squaregill Mayfly) | = (Eurycaenis lacustris) |
| Ephemeroptera (Small Squaregill Mayfly) | = (Eurycaenis pallida) |
| Ephemeroptera (Small Squaregill Mayfly) | Sparbarus maculatus |
| Ephemeroptera (Small Squaregill Mayfly) | = (Brachycercus maculatus) |
| Ephemeroptera (Small Squaregill Mayfly) | = (Brachycercus pini) |
| Ephemeroptera (Small Squaregill Mayfly) | Sparbarus miccosukee |
| Ephemeroptera (Small Squaregill Mayfly) | Sparbarus nasutus |
| Ephemeroptera (Small Squaregill Mayfly) | = (Brachycercus nasutus) |
| Ephemeroptera (Small Squaregill Mayfly) | Susperatus prudens |
| Ephemeroptera (Small Squaregill Mayfly) | = (Brachycercus prudens) |
| Ephemeroptera (Small Squaregill Mayfly) | = (Eurycaenis prudens) |
| Ephemeroptera (Small Squaregill Mayfly) | Susperatus tonkawa |
| Ephemeroptera (Small Squaregill Mayfly) | Susperatus tuberculatus |
| Ephemeroptera (Small Squaregill Mayfly) | = (Brachycercus tuberculatus) |
| Ephemeroptera (Spiny Crawler Mayfly) | Attenella attenuata |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella attenuata) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella hirsuta) |
| Ephemeroptera (Spiny Crawler Mayfly) | Attenella delantala |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella delantala) |
| Ephemeroptera (Spiny Crawler Mayfly) | Attenella margarita |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella margarita) |
| Ephemeroptera (Spiny Crawler Mayfly) | Attenella soquele |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella soquele) |
| Ephemeroptera (Spiny Crawler Mayfly) | Caudatella edmundsi |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella edmundsi) |
| Ephemeroptera (Spiny Crawler Mayfly) | Caudatella heterocaudata californica |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella heterocaudata californica) |
| Ephemeroptera (Spiny Crawler Mayfly) | Caudatella heterocaudata circia |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella heterocaudata circia) |
| Ephemeroptera (Spiny Crawler Mayfly) | Caudatella heterocaudata heterocaudata |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella columbiella) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella heterocaudata) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella heterocaudata heterocaudata) |
| Ephemeroptera (Spiny Crawler Mayfly) | Caudatella hystrix |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Caudatella cascadia) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella cascadia) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella hystrix) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella spinosa) |
| Ephemeroptera (Spiny Crawler Mayfly) | Caudatella jacobi |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella jacobi) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella orestes) |
| Ephemeroptera (Spiny Crawler Mayfly) | Caurinella idahoensis |
| Ephemeroptera (Spiny Crawler Mayfly) | Dannella lita |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella lita) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Timpanoga lita) |
| Ephemeroptera (Spiny Crawler Mayfly) | Dannella provonshai |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella provonshai) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Timpanoga provonshai) |
| Ephemeroptera (Spiny Crawler Mayfly) | Dannella simplex |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella simplex) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Timpanoga simplex) |
| Ephemeroptera (Spiny Crawler Mayfly) | Dentatella coxalis |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Dannella bartoni) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Dentatella bartoni) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Dentatella danutae) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella bartoni) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella coxalis) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Eurylophella bartoni) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Eurylophella coxalis) |
| Ephemeroptera (Spiny Crawler Mayfly) | Drunella allegheniensis |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella allegheniensis) |
| Ephemeroptera (Spiny Crawler Mayfly) | Drunella coloradensis |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella coloradensis) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella wilsoni) |
| Ephemeroptera (Spiny Crawler Mayfly) | Drunella cornuta |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella cornuta) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella depressa) |
| Ephemeroptera (Spiny Crawler Mayfly) | Drunella cornutella |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella cornutella) |
| Ephemeroptera (Spiny Crawler Mayfly) | Drunella doddsii |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Drunella doddsi) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella doddsi) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella doddsii) |
| Ephemeroptera (Spiny Crawler Mayfly) | Drunella flavilinea |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella flavilinea) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella lapidula) |
| Ephemeroptera (Spiny Crawler Mayfly) | Drunella grandis flavitincta |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella flavitincta) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella grandis flavitincta) |
| Ephemeroptera (Spiny Crawler Mayfly) | Drunella grandis grandis |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Drunella grandis) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella glacialis carsona) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella grandis) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella grandis grandis) |
| Ephemeroptera (Spiny Crawler Mayfly) | Drunella grandis ingens |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella glacialis) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella glacialis glacialis) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella grandis ingens) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella ingens) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella proserpina) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella yosemite) |
| Ephemeroptera (Spiny Crawler Mayfly) | Drunella lata |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Drunella longicornis) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella inflata) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella lata) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella longicornis) |
| Ephemeroptera (Spiny Crawler Mayfly) | Drunella pelosa |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella pelosa) |
| Ephemeroptera (Spiny Crawler Mayfly) | Drunella spinifera |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella autumnalis) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella sierra) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella spinifera) |
| Ephemeroptera (Spiny Crawler Mayfly) | Drunella tuberculata |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Drunella conestee) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella cherokee) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella conestee) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella tuberculata) |
| Ephemeroptera (Spiny Crawler Mayfly) | Drunella walkeri |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Baetis fuscata) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Drunella wayah) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella bispina) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella fuscata) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella walkeri) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella wayah) |
| Ephemeroptera (Spiny Crawler Mayfly) | Ephemerella alleni |
| Ephemeroptera (Spiny Crawler Mayfly) | Ephemerella apopsis |
| Ephemeroptera (Spiny Crawler Mayfly) | Ephemerella aurivillii |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Chitonophora aurivillii) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Cincticostella ezoensis) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella aroni) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella aronii) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella aurivilliusi) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella concinnata) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella ezoensis) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella nN) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella norda) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella taeniata) |
| Ephemeroptera (Spiny Crawler Mayfly) | Ephemerella catawba |
| Ephemeroptera (Spiny Crawler Mayfly) | Ephemerella dorothea dorothea |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella dorothea) |
| Ephemeroptera (Spiny Crawler Mayfly) | Ephemerella dorothea infrequens |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella infrequens) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella mollitia) |
| Ephemeroptera (Spiny Crawler Mayfly) | Ephemerella excrucians |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella argo) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella crenula) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella excurcians) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella inermis) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella lacustris) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella ora) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella rama) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella rossi) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella semiflava) |
| Ephemeroptera (Spiny Crawler Mayfly) | Ephemerella hispida |
| Ephemeroptera (Spiny Crawler Mayfly) | Ephemerella invaria |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Baetis invaria) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Chitonophora vernalis) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella choctawhatchee) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella femenina) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella feminina) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella floripara) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella fratercula) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella inconstans) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella rotunda) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella simila) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella vernalis) |
| Ephemeroptera (Spiny Crawler Mayfly) | Ephemerella maculata |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella euterpe) |
| Ephemeroptera (Spiny Crawler Mayfly) | Ephemerella mucronata |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Chitonophora krieghoffi) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Chitonophora mucronata) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Chitonophora mucronata unicolorata) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella krieghoffi) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella krieghoffi intermedia) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella moffatae) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella mucronata unicolorata) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella unicolorata) |
| Ephemeroptera (Spiny Crawler Mayfly) | Ephemerella needhami |
| Ephemeroptera (Spiny Crawler Mayfly) | Ephemerella nuda |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella thymali) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella verrucosa) |
| Ephemeroptera (Spiny Crawler Mayfly) | Ephemerella subvaria |
| Ephemeroptera (Spiny Crawler Mayfly) | Ephemerella tibialis |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella angusta) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella angustata) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella sequoia) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Serratella sequoia) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Serratella tibialis) |
| Ephemeroptera (Spiny Crawler Mayfly) | Ephemerella velmae |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Serratella velmae) |
| Ephemeroptera (Spiny Crawler Mayfly) | Ephemerella verruca |
| Ephemeroptera (Spiny Crawler Mayfly) | Eurylophella aestiva |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella aestiva) |
| Ephemeroptera (Spiny Crawler Mayfly) | Eurylophella bicolor |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella bicolor) |
| Ephemeroptera (Spiny Crawler Mayfly) | Eurylophella bicoloroides |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella bicoloroides) |
| Ephemeroptera (Spiny Crawler Mayfly) | Eurylophella doris |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella doris) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella trilineata) |
| Ephemeroptera (Spiny Crawler Mayfly) | Eurylophella enoensis |
| Ephemeroptera (Spiny Crawler Mayfly) | Eurylophella funeralis |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella funeralis) |
| Ephemeroptera (Spiny Crawler Mayfly) | Eurylophella lodi |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella lodi) |
| Ephemeroptera (Spiny Crawler Mayfly) | Eurylophella lutulenta |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella lineata) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella lutulenta) |
| Ephemeroptera (Spiny Crawler Mayfly) | Eurylophella macdunnoughi |
| Ephemeroptera (Spiny Crawler Mayfly) | Eurylophella minimella |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella minimella) |
| Ephemeroptera (Spiny Crawler Mayfly) | Eurylophella oviruptis |
| Ephemeroptera (Spiny Crawler Mayfly) | Eurylophella poconoensis |
| Ephemeroptera (Spiny Crawler Mayfly) | Eurylophella prudentalis |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella prudentalis) |
| Ephemeroptera (Spiny Crawler Mayfly) | Eurylophella temporalis |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella temporalis) |
| Ephemeroptera (Spiny Crawler Mayfly) | Eurylophella verisimilis |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella verisimilis) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Eurylophella versimilis) |
| Ephemeroptera (Spiny Crawler Mayfly) | Matriella teresa |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella cognata) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella teresa) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Serratella teresa) |
| Ephemeroptera (Spiny Crawler Mayfly) | Penelomax septentrionalis |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella septentrionalis) |
| Ephemeroptera (Spiny Crawler Mayfly) | Serratella frisoni |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella frisoni) |
| Ephemeroptera (Spiny Crawler Mayfly) | Serratella levis |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella levis) |
| Ephemeroptera (Spiny Crawler Mayfly) | Serratella micheneri |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella altana) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella micheneri) |
| Ephemeroptera (Spiny Crawler Mayfly) | Serratella serrata |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella carolina) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella serrata) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella sordida) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella spiculosa) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Serratella carolina) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Serratella sordida) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Serratella spiculosa) |
| Ephemeroptera (Spiny Crawler Mayfly) | Serratella serratoides |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella serratoides) |
| Ephemeroptera (Spiny Crawler Mayfly) | Teloganopsis deficiens |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella atrescens) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella deficiens) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Serratella deficiens) |
| Ephemeroptera (Spiny Crawler Mayfly) | Timpanoga hecuba hecuba |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella hecuba) |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella hecuba hecuba) |
| Ephemeroptera (Spiny Crawler Mayfly) | Timpanoga hecuba pacifica |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella hecuba pacifica) |
| Ephemeroptera (Spiny Crawler Mayfly) | Tsalia berneri |
| Ephemeroptera (Spiny Crawler Mayfly) | = (Ephemerella berneri) |
| Ephemeroptera (Tuskless Burrower Mayfly) | Dolania americana |
| Ephemeroptera (White Sand River Mayfly) | Pseudiron centralis |
| Ephemeroptera (White Sand River Mayfly) | = (Pseudiron meridionalis) |