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Ephemerella aurivillii Mayfly Nymph Pictures

 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 (
A few (not all) of the abdominal tubercles on this Ephemerella needhami nymph are circled.  They are especially large in this species.
A few (not all) of the abdominal tubercles on this Ephemerella needhami nymph are circled. They are especially large in this species.
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.


This mayfly was collected from Mongaup Creek on April 19th, 2006 and added to Troutnut.com on April 21st, 2006.


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