This specimen was collected together with a lighter one of the same species.
It resembles another specimen from about 1300 miles away in Wisconsin, which I tentatively called Ephemerella needhami. This one has much less prominent abdominal tubercles (
Tubercle: Various peculiar little bumps or projections on an insect. Their character is important for the identification of many kinds of insects, such as the nymphs of Ephemerellidae mayflies.). It may be that they're both the same species and I don't have my identifications straight.
A few (not all) of the abdominal tubercles on this Ephemerella needhami
nymph are circled. They are especially large in this species.
This mayfly was collected from Mongaup Creek on April 19th, 2006 and added to Troutnut.com on April 21st, 2006.
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