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Troutnut Forum > Specimen Discussion > Probably Agnetina capitata

The Specimen

Agnetina capitata (Golden Stone) Stonefly NymphAgnetina capitata (Golden Stone) Stonefly NymphView 5 Pictures
Region: Northeast
Collected Mar 29, 2005
Added Apr 7, 2006

The Discussion

GONZOOctober 4th, 2006, 3:58 pm
"Bear Swamp," PA

Posts: 1003
The row of spinules across the back of the head in combination with the presence of anal gills indicates that Agnetina is the likely genus; and the dorsal pattern appears to be classic capitata.
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Replies:
TroutnutOctober 4th, 2006, 4:00 pm
Fairbanks, AK

Posts: 1144
Thanks. I've moved it to that species.
Jason Neuswanger
The Troutnut
MattyLJuly 2nd, 2008, 10:15 am
Clifton Park, NY

Posts: 1
Just to add to Gonzo's assessment of characteristics, A. capitata is identified most definitively by looking at the dark pigment on tergum 10 as well as the head pattern. With this species, the pigment band on tergum 10 is uninterrupted (though it narrows quite a bit). The head "M line" is nearly lateral, as apposed to A. flavescens, for example, which really looks like an M with posterolaterally directed arms.
-Matt
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