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Mayfly Genus Epeorus (Little Maryatts)

Taxonomic Navigation -?-
Species in EpeorusNumber of SpecimensNumber of Pictures
Epeorus albertaePink Lady730
Epeorus deceptivus18
Epeorus fragilis00
Epeorus frisoni426
Epeorus grandis214
Epeorus longimanusSlate Brown Dun35
Epeorus pleuralisQuill Gordon542
Epeorus punctatus00
Epeorus suffusus00
Epeorus vitreusSulphur1562

9 species aren't included.
Common Names
Pictures Below

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

  • The behavior and habitat of Epeorus.
  • 9 underwater pictures of Epeorus.

Pictures of 47 Mayfly Specimens in the Genus Epeorus:

Specimen Page:1234...6
Female Epeorus frisoni Mayfly SpinnerFemale Epeorus frisoni  Mayfly Spinner View 8 PicturesI collected this female spinner together with a male dun, a female dun, and another male dun.
Collected September 6, 2006 from Mystery Creek #23 in New York
Added to Troutnut.com by Troutnut on October 3, 2006
Epeorus pleuralis (Quill Gordon) Mayfly NymphEpeorus pleuralis (Quill Gordon) Mayfly Nymph View 4 PicturesThis Epeorus pluralis dun is recently deceased in these photos. I decided not to photograph several lively, less mature nymphs. This one was ready to hatch, as indicated by the black wing pads (
The wing pads on this final instar Baetidae mayfly nymph are extremely dark.
The wing pads on this final instar Baetidae mayfly nymph are extremely dark.
Wing pad: A protrusion from the thorax of an insect nymph which holds the developing wings. Black wing pads usually indicate that the nymph is nearly ready to emerge into an adult.
)
. I believe it had not been dead long enough to lose its natural coloration.
Collected April 19, 2006 from Mongaup Creek in New York
Added to Troutnut.com by Troutnut on April 21, 2006
Female Epeorus frisoni Mayfly DunFemale Epeorus frisoni  Mayfly Dun View 7 PicturesI collected this female dun together with a female spinner, a male dun, and a larger, damaged male dun.
Collected September 6, 2006 from Mystery Creek #23 in New York
Added to Troutnut.com by Troutnut on October 3, 2006
Female Epeorus (Little Maryatts) Mayfly DunFemale Epeorus (Little Maryatts) Mayfly Dun View 5 PicturesI'm guessing this female is of the same species as this male dun, because they came from the same pool at the same time and the size matches, although the males and females would look very different in this case.
Collected July 5, 2017 from the South Fork Sauk River in Washington
Added to Troutnut.com by Troutnut on July 6, 2017
Epeorus vitreus (Sulphur) Mayfly NymphEpeorus vitreus (Sulphur) Mayfly Nymph View 3 PicturesKey features I discerned with a microscope include that the femoral flange is sharp, and the first gill is not extended.
Collected February 7, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Male Epeorus vitreus (Sulphur) Mayfly DunMale Epeorus vitreus (Sulphur) Mayfly Dun View 4 PicturesThis is my favorite mayfly from 2004, and it appears on my popular Be the Trout: Eat Mayflies products. Check them out!

Its identification is really up in the air. It might be a late-season vitreus dun but it may very well be one of the more obscure species in that genus.
Collected September 2, 2004 from the Beaverkill River in New York
Added to Troutnut.com by Troutnut on January 25, 2006
Epeorus grandis Mayfly NymphEpeorus grandis  Mayfly Nymph View 3 Pictures
Collected April 8, 2005 from Yellow Bay Creek in Montana
Added to Troutnut.com by Bnewell on June 27, 2011
Specimen Page:1234...6
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