Stenonema femoratum (Cream Cahill) Mayfly Nymph Pictures
Classification
Kingdom Animalia (Animals)
» Phylum Arthropoda (Arthropods)
» Class Insecta (Insects)
» Order Ephemeroptera (Mayflies)
» Family Heptageniidae (March Browns, Cahills, Quill Gordons)
» Genus Stenonema
» Species femoratum (Cream Cahill)
This mayfly was collected from the Catskills on May 6th, 2007 and added to Troutnut.com on May 18th, 2007.
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This is the picture that shows why this is Stenonema instead of Maccaffertium. The main gills are rounded rather than truncate (square-ish) and the last, thread-like pair of gills is visibly tracheated (that little stripe through the center). Those characteristics distinguish Stenonema femoratum.
CameraCanon EOS 20D
Recent Discussions of this Nymph
Finally my "Stenonema" section isn't empty 2 Replies »
I've been looking for one of these for a while. After I realized that everything I was calling Stenonema had been renamed to Maccaffertium, the section for this once-popular genus was empty. Now with this one from a small stream in the Catskills I'm pretty sure I've got an actual Stenonema again.
I would welcome a verification from those of you with more entomological training, but it looks right to me.
ReplyI would welcome a verification from those of you with more entomological training, but it looks right to me.
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