Close examination under a microscope easily showed 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.).
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 unknown on January 31st, 2004 and added to Troutnut.com on January 25th, 2006.
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