Notes from the microscope on the ID: Maxillary palp (
Palp: A long, thin, often segmented appendage which can protrude from certain insect mouth parts such as the maxillae. Also known as the < />palpus.) is present, distinctly 2-segmented, but very small. Gills on segment 4-7. This specimen has some unfortunate damage to the abdomen, but it's the only one I found in my sample.
The palp on the maxilla of an Ephemerella
nymph (detached and photographed under a microscope) is highlighted in red here.
This mayfly was collected from the East Fork Big Lost River on August 3rd, 2020 and added to Troutnut.com on August 19th, 2020.
Start a Discussion of this Nymph:
You must log in
at the top of the page to post. If you haven't registered yet, it's this easy: