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Mayfly Family Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs)

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» Family Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs)
Genus in EphemerellidaeNumber of SpecimensNumber of Pictures
Attenella417
Caudatella47
Dannella00
DrunellaBlue-Winged Olives30138
EphemerellaHendricksons, Sulphurs, PMDs129576
EurylophellaChocolate Duns22108
Matriella00
Penelomax325
Serratella00
TeloganopsisLittle black Quills16
Timpanoga25

3 genera aren't included.
Common Name
Pictures Below

This is page 3 of specimens of Ephemerellidae. Visit the main Ephemerellidae page for:

  • The behavior and habitat of Ephemerellidae.
  • 37 underwater pictures of Ephemerellidae.
  • 1 streamside picture of Ephemerellidae.

Pictures of 211 Mayfly Specimens in the Family Ephemerellidae:

Specimen Page:1234...22
Ephemerella needhami (Little Dark Hendrickson) Mayfly DunEphemerella needhami (Little Dark Hendrickson) Mayfly Dun View 7 PicturesSee the comments for an interesting discussion of the identification of this dun.
Collected June 1, 2007 from the West Branch of the Delaware River in New York
Added to Troutnut.com by Troutnut on June 4, 2007
Female Ephemerella (Hendricksons, Sulphurs, PMDs) Mayfly SpinnerFemale 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.
Collected May 28, 2007 from Mystery Creek #42 in Pennsylvania
Added to Troutnut.com by Troutnut on June 4, 2007
Female Ephemerella subvaria (Hendrickson) Mayfly DunFemale Ephemerella subvaria (Hendrickson) Mayfly Dun View 9 PicturesI collected this female Hendrickson dun and a male in the pool on the Beaverkill where the popular Hendrickson pattern was first created. She is descended from mayfly royalty.
Collected April 19, 2006 from the Beaverkill River in New York
Added to Troutnut.com by Troutnut on April 22, 2006
Ephemerella dorothea dorothea (Pale Evening Dun) Mayfly NymphEphemerella dorothea dorothea (Pale Evening Dun) Mayfly Nymph View 6 PicturesI keyed this nymph carefully under a microscope to check that it's Ephemerella dorothea.
Collected May 29, 2007 from Paradise Creek in Pennsylvania
Added to Troutnut.com by Troutnut on June 4, 2007
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 aurivillii Mayfly NymphEphemerella aurivillii  Mayfly Nymph View 7 Pictures
Collected May 10, 2008 from the Chena River in Alaska
Added to Troutnut.com by Troutnut on April 20, 2011
Ephemerella aurivillii Mayfly NymphEphemerella aurivillii  Mayfly Nymph View 7 Pictures
Collected May 10, 2008 from the Chena River in Alaska
Added to Troutnut.com by Troutnut on April 20, 2011
Specimen Page:1234...22
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