Mayfly Family Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs)
Taxonomic Navigation -?-
Kingdom Animalia (Animals)
» Phylum Arthropoda (Arthropods)
» Class Insecta (Insects)
» Order Ephemeroptera (Mayflies)
» Family Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs)
| Genus in Ephemerellidae |  |  |
| Attenella | 5 | 28 |
| Caudatella | 0 | 0 |
| Dannella | 0 | 0 |
| DrunellaBlue-Winged Olives | 8 | 60 |
| EphemerellaHendricksons, Sulphurs, PMDs | 122 | 556 |
| EurylophellaChocolate Duns | 15 | 64 |
| Serratella | 1 | 6 |
| Timpanoga | 0 | 0 |
2 genera aren't included.
Common Name
| Match | Common Name |
 | Hendricksons, Sulphurs, PMDs, BWOs |
This is page 7 of specimens of Ephemerellidae. Visit the main Ephemerellidae page for:
- The behavior and habitat of Ephemerellidae.
- 37 underwater pictures of Ephemerellidae.
- 9 streamside pictures of Ephemerellidae.
166 Mayfly Specimens in the Family Ephemerellidae:
Ephemerella needhami (Little Dark Hendrickson) Mayfly Nymph
View 6 PicturesI photographed three strange striped Ephemerella nymphs from the same trip on the same river: this one, a brown one, and a very very striped one. I have tentatively put them all in Ephemerella needhami for now.
View 6 PicturesI photographed three strange striped Ephemerella nymphs from the same trip on the same river: this one, a brown one, and a very very striped one. I have tentatively put them all in Ephemerella needhami for now.Region: Upper Midwest
Collected Jun 9, 2005
Added May 26, 2006
Ephemerella invaria (Sulphur) Mayfly Spinner
View 4 Pictures
View 4 PicturesRegion: Upper Midwest
Collected May 23, 2004
Added Jan 25, 2006
Ephemerella (Hendricksons, Sulphurs, PMDs) Mayfly Spinner
View 8 PicturesI've seen Ephemerella invaria with green egg sacs and Ephemerella subvaria with yellow one. This one seems too large for dorothea. So what is it? I'm not sure.
Many females of this species were gathered in tight clouds to lay their eggs over the riffles in a mid-sized Pocono stream right at dusk. It would have been a fishable spinner fall if I'd stuck around to wait for them.
View 8 PicturesI've seen Ephemerella invaria with green egg sacs and Ephemerella subvaria with yellow one. This one seems too large for dorothea. So what is it? I'm not sure.Many females of this species were gathered in tight clouds to lay their eggs over the riffles in a mid-sized Pocono stream right at dusk. It would have been a fishable spinner fall if I'd stuck around to wait for them.
Region: Poconos
Collected May 28, 2007
Added Jun 4, 2007
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
Ephemerella dorothea (Sulphur) Mayfly Spinner
View 5 Pictures
View 5 PicturesRegion: PA Limestone
Collected May 26, 2007
Added Jun 4, 2007
Ephemerella invaria (Sulphur) Mayfly Dun
View 4 Pictures
View 4 PicturesRegion: Upper Midwest
Collected May 26, 2005
Added May 16, 2006
Ephemerella subvaria (Hendrickson) Mayfly Nymph
View 4 Pictures
View 4 PicturesRegion: Upper Midwest
Collected Jan 13, 2004
Added Jan 25, 2006
Ephemerella (Hendricksons, Sulphurs, PMDs) Mayfly Nymph
View 6 PicturesThis pretty Ephemerella nymph has really weird markings. It has one band on the tibiae (Tibia: A middle segments in the leg of an insect, located between the femur and the tarsus.) and a thin but distinct dorsal (Dorsal: Top.) stripe faded in the center which looks very different from the stripes on Ephemerella needhami and Ephemerella aurivillii. It definitely has the fan tail characteristic of the Ephemerella genus.
View 6 PicturesThis pretty Ephemerella nymph has really weird markings. It has one band on the tibiae (Tibia: A middle segments in the leg of an insect, located between the femur and the tarsus.) and a thin but distinct dorsal (Dorsal: Top.) stripe faded in the center which looks very different from the stripes on Ephemerella needhami and Ephemerella aurivillii. It definitely has the fan tail characteristic of the Ephemerella genus.
View Full Size
Region: Upper Midwest
Collected Feb 7, 2004
Added Jan 25, 2006
Ephemerella subvaria (Hendrickson) Mayfly Nymph
View 4 PicturesHere's one of the darkest E. subvaria nymphs I've seen.
View 4 PicturesHere's one of the darkest E. subvaria nymphs I've seen.Region: Upper Midwest
Collected Feb 7, 2004
Added Jan 25, 2006
Ephemerella dorothea (Sulphur) Mayfly Dun
View 5 Pictures
View 5 PicturesRegion: Poconos
Collected May 27, 2007
Added Jun 4, 2007
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