(Yakima Stone)
Copyright © 2004 The Xerces Society
Copyright © 2009 Bill P. Stark
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WA Stonefly Description |
| Taxonomic Name (Common Name) | Nymph | Adult |
| Perlodidae (Patterned Stone) | Tails equal in length or longer than abdomen; no branching gills behind base of legs; metathoracic wingpads strongly diverging from body. |
| Osobenus (Yakima Stone) | preserved nymph Copyright © 2004 The Xerces Society | adult Copyright © 2009 Bill P. Stark |
| Gills are absent and the male 10th tergum is cleft; epiproct consists of an upturned dorsal sclerite surmounting a basal bulbous structure. | ||
| Osobenus yakimae |
State of Washington distribution is based on: Valid Stonefly Names for North America.
Created: 08/16/2013 Last modified: 12/08/2014 www.FlyfishingEntomology.com