Troutnut.com Fly Fishing for Trout Home
User Password
or register.
Scientific name search:

Ephemerella invaria (Sulphur Dun) Mayfly Nymph Pictures

 I looked at this nymph closely under a microscope to ascertain some key features I was wondering about in previous photographs of similar specimens. It definitely does have the fan-tail characteristic of the Ephemerella genus. It also has strongly 2-banded tibiae (
The tibia of this Isonychia bicolor mayfly spinner is highlighted in red.
The tibia of this Isonychia bicolor mayfly spinner is highlighted in red.
Tibia: A middle segments in the leg of an insect, located between the femur and the tarsus.
)
and definite tiny 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.
)
.


This mayfly was collected from unknown on February 7th, 2004 and added to Troutnut.com on January 25th, 2006.

Shown Full Size
AddEmail
Ephemerella invaria (Sulphur Dun) Mayfly Nymph from unknown in Wisconsin
Shown Full Size
AddEmail
Ephemerella invaria (Sulphur Dun) Mayfly Nymph from unknown in Wisconsin
Shown Full Size
AddEmail
Ephemerella invaria (Sulphur Dun) Mayfly Nymph from unknown in Wisconsin
Shown Full Size
AddEmail
Ephemerella invaria (Sulphur Dun) Mayfly Nymph from unknown in Wisconsin

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:

Username:          Email:

Password:    Confirm Password:

I am at least 13 years old and agree to the rules.
Top 10 Fly Hatches
Top Gift Shop Designs
Top Insect Specimens
Miscellaneous Sites