|Option 1||Option 2|
|Tibiae with several pairs of stout, spur-like setae (sf 19.317)||Tibiae each with only 1 pair of stout, spur-like setae at apex (sf 19.318)|
|Remaining genera: Allocosmoecus and Dicosmoecus||Remaining genera: Amphicosmoecus, Eocosmoecus, and Onocosmoecus|
3 Example Specimens
This specimen keys pretty easily to Onocosmoecus, and it closely resembles a specimen from Alaska which caddis expert Dave Ruiter recognized as this genus. As with that specimen, the only species in the genus documented in this area is Onocosmoecus unicolor, but Dave suggested for that specimen that there might be multiple not-yet-distinguished species under the unicolor umbrella and it would be best to stick with the genus-level ID. I'm doing the same for this one.
See the forum discussion for discussion with a caddis expert (Dave Ruiter / Creno) about the identification of this specimen. I'm a bit perplexed because some gills seem to have more than 4 branches, which would lead in a different direction at Couplet 18 of the Key to Genera of Limnephilidae Larvae, but Dave knew his stuff a lot better than I did. He was convinced this is Onocosmoecus. The current range maps would put this in Onocosmoecus unicolor as the only option, but he believed there are probably multiple not-yet-distinguished species under that umbrella and suggested keeping this one's ID at the genus level for that reason.
|Go to Couplet 37||Go to Couplet 38|