This is a really strange specimen. I would guess it's one of the dry caddis pupa that scoots across the surface of the water as a pupa rather than emerging right away. Its "wing pads (
Wing pad: A protrusion from the thorax of an insect nymph which holds the developing wings. Black wing pads usually indicate that the nymph is nearly ready to emerge into an adult.)" sure don't look right, though. Maybe they're deformed and that's why I was able to find this one as a pupa in the first place. It also looks like it might be a caddis adult missing its wings, but since I found three of them, that kind of rules out such an anomalous maiming.
The wing pads on this final instar Baetidae
mayfly nymph are extremely dark.
I found this one and one other on a midstream rock. The previous day, I caught a similar creature kicking around on the water's surface.
This one died and shriveled a little bit before I could photograph it, but it's basically in its original shape.
This caddisfly was collected from Brodhead Creek on May 29th, 2007 and added to Troutnut.com on June 4th, 2007.
Recent Discussions of this Adult
Dolophilodes adult 3 Replies »
Posted by Ictodd
on Jun 7, 2007
Last reply on Nov 22, 2007 by GONZO
Ross (1944) mentions that Dolophilodes (Trentonius) distinctus adults "...remarkable b/c of the production of adults during the entire year, incl. the winter months, and the wingless condition of most of the females.....records indicate the females produced during the colder months are all wingless.....Winged females have been taken during the warmer months of the year." He goes on to mention that wing presence is caused by temperature reactions influencing late larvae. Was it a really cold stream? Seems late for ambient air influences.ReplyDragonfly nymph? 12 Replies »
Posted by Taxon
on Jun 4, 2007
Ignoring the (perhaps deformed) wing pads, to me at least, the general body shape looks a lot more like a dragonfly nymph.Reply
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