Mayfly Species Ephemerella aurivillii
Taxonomic Navigation -?-
Kingdom Animalia (Animals)
» Phylum Arthropoda (Arthropods)
» Class Insecta (Insects)
» Order Ephemeroptera (Mayflies)
» Family Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs)
» Genus Ephemerella (Hendricksons, Sulphurs, PMDs)
» Species aurivillii
I'm not certain of the identification of the nymphs I've put in this section. Their striped appearance only seems to fit Ephemerella aurivilli and Ephemerella needhami, but they seem too large and don't have such prominent abdominal tubercles (
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A few (not all) of the abdominal tubercles on this Ephemerella needhami nymph are circled. They are especially large in this species.
7 Mayfly Specimens in the Species Ephemerella aurivillii:
Ephemerella aurivillii Mayfly Nymph
View 9 PicturesI'm pretty sure this is Ephemerella aurivillii. The body is 11mm long, which rules out most other species, and the hind legs seem to be more than 1.5 times longer than the fore legs -- a key characteristic for this species.
This specimen isn't in the best of shape, as it's missing all three tails, but it's the only one of its species I captured in this sample.
View 9 PicturesI'm pretty sure this is Ephemerella aurivillii. The body is 11mm long, which rules out most other species, and the hind legs seem to be more than 1.5 times longer than the fore legs -- a key characteristic for this species.This specimen isn't in the best of shape, as it's missing all three tails, but it's the only one of its species I captured in this sample.
Region: Catskills
Collected May 6, 2007
Added May 18, 2007
Ephemerella aurivillii Mayfly Nymph
View 5 PicturesClose examination under a microscope showed definite small 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.) on the back of this nymph.
View 5 PicturesClose examination under a microscope showed definite small tubercles (A few (not all) of the abdominal tubercles on this Ephemerella needhami nymph are circled. They are especially large in this species.
Region: Upper Midwest
Collected Feb 5, 2004
Added Jan 25, 2006
Ephemerella aurivillii Mayfly Nymph
View 3 PicturesThis specimen seems to be morphologically identical to the darker specimens of its species, but it's a very distinctly different color. I'm guessing this is a gender difference, just as I've guessed for the similar E. subvaria nymphs.
View 3 PicturesThis specimen seems to be morphologically identical to the darker specimens of its species, but it's a very distinctly different color. I'm guessing this is a gender difference, just as I've guessed for the similar E. subvaria nymphs.Region: Upper Midwest
Collected Feb 5, 2004
Added Jan 25, 2006
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