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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Caddisflies (Trichoptera) » Annulipalpia » Hydropsychoidea » Netspinning Caddisflies (Hydropsychidae) » Hydropsychinae » Hydropsyche » Hydropsyche rossi
Photo#712902
Hydropsyche rossi
Copyright © 2012 Robert G Henricks

Hydropsyche rossi
Crofton, Fluvanna County, Virginia, USA
September 29, 2012
the rows of muscle scars do not turn towards the top of the head posteriorly; for a contrast, see the pictures posted with H. venularis.

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Hydropsyche rossi Hydropsyche rossi Hydropsyche rossi Hydropsyche rossi
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Contributed by Robert G Henricks on 9 October, 2012 - 3:15pm
Last updated 10 October, 2012 - 2:17pm

nice pic
but what does "do not curve dorsad posteriorly" mean? What do yo mean by "curve"? The lateral scars do not extend dorsally to the mid line? Do you have pics of both you could place next to each other to show the differences?
… Dave Ruiter, 9 October, 2012 - 7:23pm login or register to post comments

 
Hydropsyche rossi
I'm following Steven Beaty on this -- "The Trichoptera of North Carolina," p. 76. His words, on H. rossi, "rows of muscle scars on side of head not curved dorsad posteriorly."
I take that to mean that the rows do not move up towards the top of the head at the back of the head. On H. venularis, they "do" "curve dorsad posteriorly" (Beaty, p. 76). I've added a photo of H. venularis to show that.

Bob Henricks
… Robert G Henricks, 9 October, 2012 - 8:06pm login or register to post comments

Moved
Moved from Hydropsyche.
… v belov, 9 October, 2012 - 4:29pm login or register to post comments

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