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The Specimen

Rheotanytarsus Midge LarvaRheotanytarsus  Midge Larva View 6 PicturesThis peculiar midge lived in a case tightly fixed to a rock, with several others of its kind. The case seems to be made of tiny grains of sand. I'm not sure what the function is for the little lines sticking out the front, because they aren't legs.
Collected April 14, 2007 from Cayuta Creek in New York
Added to Troutnut.com by on April 22, 2007

The Discussion

DMMApril 22nd, 2007, 9:56 pm
Posts: 34I believe this is Rheotanytarsus
David
TaxonApril 23rd, 2007, 12:03 am
Site Editor
Plano, TX

Posts: 1311
I believe this is Rheotanytarsus


David-

I know very little about Chironomids, but am interested in learning. So, I went to Merritt & Cummins to see if I could follow how you made this identification. The last larval couplet for Rheotanytarsus reads as follows:

15’. Distal portion of 2nd antennal segment only moderately expanded (Fig. 26.121);
………mentum not strongly arched (Fig. 26.102) …………… Rheotanytarsus Bause

Fig. 26.121 appears below, and is titled Second antennal segment of Rheotanytarsus sp.



Jason’s picture_2885_full cropped to show only the head and darkened a bit appears below:



Unless I am seriously missing something, which certainly wouldn’t be unprecedented, Rheotanytarsus antennae appear to be branched following the 2nd segment, and I don’t see that character in Jason’s picture. Please advise.
Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com
TaxonApril 23rd, 2007, 1:38 pm
Site Editor
Plano, TX

Posts: 1311
Really great information, David. There are some of us on here who really appreciate the details, so please don't be reluctant to volunteer them.
Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com
TroutnutApril 23rd, 2007, 6:08 pm
Administrator
Bellevue, WA

Posts: 2592
Ditto what Taxon said.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist

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