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Caddisflies? - Hydroptila grandiosa

Caddisflies? - Hydroptila grandiosa
Hancock County, Indiana, USA
July 3, 2011
Size: ~ 2.5 mm
I've been seeing a number of these in my blacklight sample, and I've been wondering what they are. They look like small caddisflies, and the large clump of setae behind the eyes looks peculiar.

Images of this individual: tag all
Caddisflies? - Hydroptila grandiosa Caddisflies? - Hydroptila grandiosa

Moved from Hydroptila.

Brad sent me a vial of Hydroptila males (see picture) which he pulled out of a larger vial of material from a black light sample. The smaller vial had a number of specimens for this species and a single specimen of another species. I think all the specimens in this photo are of H. grandiosa Ross. I've also looked through the remaining material and came up with several other microcaddisfly taxa including: Hydroptila consimilis Morton, H. perdita Morton, H. waubesiana Betten and Oxyethira sp.

Sorry it took me so long to get back to this, Brad. Thanks for the material -- it's always fun to look at black light samples. I'll try to get the rest identified for you soon.

Thanks Brady!

I'd be happy to take a look a
I'd be happy to take a look at the specimens, unless Dave would prefer to see them instead.

thanks Brady
I'll shoot you an email when I finish sorting thru the sample and get these guys ready to send.

Moved from Microcaddisflies.

pick the bottom one
In the multi-critter image the bottom image it looks like the male parts are extruded - although covered with hairs. If you can clean the specimen and get a close up of those parts we may be able to figure out what it is. Otherwise send them to Brady. There are lots of neat/rare/new hydroptilids out there so there is no telling what you may find. Especially around intermittent streams.

The scent glands are really neat structures and if you are lucky you will get one that is completely extruded.

Moved from ID Request.

Several males here so a species ID would probably be possible with closer photo or if examined under the scope. The "clump of setae" is the scent gland. Sometimes they are raised away from the head like here and sometimes not.

Thanks Brady
I can see now how the scent glands get held against the head.

I ran it thru the key in Usinger (1), and it keys to Hydroptila (no ocelli, lacks spur on front tibiae, and metascutellum pentagonal/triangular).

I can try and get a closer image of an important detail that would help with ID, or I could even send you these if you're interested in the specimens.

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