(Tiny Black Stone)
Copyright © 2012 Bob Newell
(Widespread Snowfly)
(Slender Snowfly)
(Dwarf Snowfly)
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WA Stonefly Description |
| Taxonomic Name (Common Name) | Nymph | Adult |
| Capniidae (Slender Winter Stonefly) | Abdominal terga widest posterially; paraglossa and glossa about equal in length. |
| (Slender Winter Stonefly) | (no photo) | (no photo) |
| Abdominal terga widest posterially; paraglossa and glossa about equal in length. |
| Bolshecapnia (Tiny Black Stone) | (no photo) | (no photo) |
| Males have a ventral vestigal on 9th sternum and are large in size. | ||
| Bolshecapnia sasquatchi |
| Capnia (Tiny Black Stone) | (no photo) | Copyright © 2012 Bob Newell |
| Length: 5 - 10 mm. Occur in cold, clear, rocky bottomed, small to midlle-sized streams, winter month emerger. | ||
| Capnia confusa (Widespread Snowfly) | January through early August emerger. | |
| Capnia elongata | ||
| Capnia excavata | ||
| Capnia gracilaria (Slender Snowfly) | Most frequently collected species. Commonly found in rapid, clear, streams and rivers with gravelly and rocky substrates. The evenly curved, thin epiproct of male is distinctive for species. Late December through mid July (in high elevations) emerger. | |
| Capnia licina | ||
| Capnia melia | ||
| Capnia nana (Dwarf Snowfly) | Frequently collected species. Emerges from Novenber to June. | |
| Capnia promota | ||
| Capnia sextuberculata |
| Capnia confusa (Widespread Snowfly) | (no photo) | (no photo) |
| January through early August emerger. |
| Capnia gracilaria (Slender Snowfly) | (no photo) | (no photo) |
| Most frequently collected species. Commonly found in rapid, clear, streams and rivers with gravelly and rocky substrates. The evenly curved, thin epiproct of male is distinctive for species. Late December through mid July (in high elevations) emerger. |
| Capnia nana (Dwarf Snowfly) | (no photo) | (no photo) |
| Frequently collected species. Emerges from Novenber to June. |
| Capnura (Tiny Black Stone) | (no photo) | (no photo) |
| Epiproct is divided into an upper and lower limb, neither laterally divided.. | Males w/ wing shortening; found in small and ephemeral streams draining foothill regions. | |
| Capnura elevata | ||
| Capnura venosa |
| Eucapnopsis (Tiny Black Stone) | (no photo) | adult Copyright © 2011 Brady Richards |
| Eucapnopsis brevicauda |
| Isocapnia (Tiny Black Stone) | (no photo) | (no photo) |
| Have long vertical swimming hairs fringing cerci. | ||
| Isocapnia abbreviata | ||
| Isocapnia agassizi | ||
| Isocapnia grandis | ||
| Isocapnia palousa | ||
| Isocapnia rickeri | ||
| Isocapnia spenceri | ||
| Isocapnia vedderensis |
| Mesocapnia (Tiny Black Stone) | (no photo) | (no photo) |
| Males w/epiproct tip constricted as a narrow spine; females w/nipple on midline of subgenital plate projecting to rear. | Some species have shortened wings, with shortening more noticible in males than females. | |
| Mesocapnia autumna | ||
| Mesocapnia oenone | ||
| Mesocapnia porrecta | ||
| Mesocapnia projecta |
| Paracapnia (Tiny Black Stone) | (no photo) | (no photo) |
| Both adults and nymphs exhibit extreme harriness, even in 1st instar. | Males have thin, tubular epeproct, regularly have shortened wings, while females are usually long-winged. | |
| Paracapnia ensicala |
| Utacapnia (Tiny Black Stone) | larva (nymph) Copyright © 2010 Arlo Pelegrin | (no photo) |
| Found in high mountains with some species encountered on wave-washed rocky beaches of lakes. | Epiproct divided into upper and long to very long lower limb, w/upper limb often divided into horn-like projections. | |
| Utacapnia imbera |
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