Insect Order Ephemeroptera (Mayflies)
Taxonomic Navigation -?-
Kingdom Animalia (Animals)
» Phylum Arthropoda (Arthropods)
» Class Insecta (Insects)
» Order Ephemeroptera (Mayflies)
8 families aren't included.
Common Name
| Match | Common Name |
 | Mayflies |
Fly Imitations by Orvis
| Stage | Fly Pattern |
| Nymph | Hare's Ear |
| Nymph | Pheasant Tail |
| Nymph | RS2 |
| Dun | Adams |
| Dun | CDC Comparadun |
| Dun | Sparkle Dun |
| Spinner | AK's Spinner |
This is page 52 of specimens of Ephemeroptera. Visit the main Ephemeroptera page for:
- The behavior and habitat of Ephemeroptera.
- 67 underwater pictures of Ephemeroptera.
- 32 streamside pictures of Ephemeroptera.
516 Mayfly Specimens:
Ephemerella invaria (Sulphur) Mayfly Nymph
View 4 PicturesI looked at this small Ephemerella nymph very carefully under a microscope. It as no 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.) and 1-banded tibiae (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.
View 4 PicturesI looked at this small Ephemerella nymph very carefully under a microscope. It as no abdominal tubercles (
View Full SizeA 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 7, 2004
Added Jan 25, 2006
Caenis (Angler's Curses) Mayfly Nymph
View 2 PicturesI confirmed the identity of this nymph by looking at it under a microscope to be certain of the shape of its gills and head.
View 2 PicturesI confirmed the identity of this nymph by looking at it under a microscope to be certain of the shape of its gills and head.Region: Upper Midwest
Collected Jan 31, 2004
Added Jan 25, 2006
Eurylophella (Chocolate Duns) Mayfly Nymph
View 5 Pictures
View 5 PicturesRegion: Upper Midwest
Collected Jan 31, 2004
Added Jan 25, 2006
Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs) Mayfly Nymph
View 2 PicturesClose examination of this specimen under a microscope reveals that it has small rounded 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 tergites (Tergite: The top (dorsal) part of a single segment on an insect's abdomen.) and the tails are uniformly covered with short black hairs. Looking at this specimen a while later, my early observations were probably not relevant because it was such as small 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.) mayfly that its identifying characteristics were not fully developed.
View 2 PicturesClose examination of this specimen under a microscope reveals that it has small rounded 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 Jan 31, 2004
Added Jan 25, 2006
Baetidae (Blue-Winged Olives) Mayfly Nymph
View 3 Pictures
View 3 PicturesRegion: Upper Midwest
Collected Jan 13, 2004
Added Jan 25, 2006
Epeorus vitreus (Sulphur) Mayfly Nymph
View 3 PicturesI suspect this is an Epeorus vitreus nymph. At the current 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.), it's tough to make out the pair of dots on the tergites (Tergite: The top (dorsal) part of a single segment on an insect's abdomen.) which signify that species, but with zooming and contrast enhancement they become evident.
View 3 PicturesI suspect this is an Epeorus vitreus nymph. At the current 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.), it's tough to make out the pair of dots on the tergites (Tergite: The top (dorsal) part of a single segment on an insect's abdomen.) which signify that species, but with zooming and contrast enhancement they become evident.Region: Upper Midwest
Collected Jan 13, 2004
Added Jan 25, 2006
Eurylophella (Chocolate Duns) Mayfly Nymph
View 3 Pictures
View 3 PicturesRegion: Upper Midwest
Collected Feb 5, 2004
Added Jan 25, 2006
Caenis (Angler's Curses) Mayfly Dun
View 1 Pictures
View 1 PicturesRegion: Upper Midwest
Collected Aug 5, 2004
Added Jan 19, 2006
Caenis (Angler's Curses) Mayfly Nymph
View 3 Pictures
View 3 PicturesRegion: Upper Midwest
Collected Feb 7, 2004
Added Jan 25, 2006
Eurylophella (Chocolate Duns) Mayfly Nymph
View 4 PicturesClose examination under a microscope easily showed 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.).
View 4 PicturesClose examination under a microscope easily showed abdominal 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 Jan 31, 2004
Added Jan 25, 2006
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