» Species invaria (Sulphur Dun)
This is page 3 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:
Ephemerella invaria (Sulphur Dun) Mayfly Nymph
View 4 PicturesI 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 (Tibia: A middle segments in the leg of an insect, located between the femur and the tarsus.) and definite tiny 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.