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Mayfly Species Ephemerella invaria (Sulphur Dun)

Pictures Below

This is page 2 of specimens of Ephemerella invaria. Visit the main Ephemerella invaria page for:

  • The behavior and habitat of Ephemerella invaria.
  • 15 underwater pictures of Ephemerella invaria.

Pictures of 45 Mayfly Specimens in the Species Ephemerella invaria:

Specimen Page:1234...6
Ephemerella invaria (Sulphur Dun) Mayfly NymphEphemerella invaria (Sulphur Dun) Mayfly Nymph View 8 PicturesThis small Ephemerella invaria nymph was at least a month away from emergence.
Collected April 19, 2006 from the Beaverkill River in New York
Added to Troutnut.com by Troutnut on April 21, 2006
Ephemerella invaria (Sulphur Dun) Mayfly NymphEphemerella invaria (Sulphur Dun) Mayfly Nymph View 4 PicturesI looked at this small Ephemerella nymph very carefully under a microscope. It as no 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.
)
and 1-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.
)
. I think just a very early instar (Instar: Many invertebrates molt through dozens of progressively larger and better-developed stages as they grow. Each of these stages is known as an instar. Hard-bodied nymphs typically molt through more instars than soft-bodied larvae.) invaria nymph.
Collected February 7, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Specimen Page:1234...6
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