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Mayfly Genus Epeorus (Little Maryatts)

Taxonomic Navigation -?-
» Genus Epeorus (Little Maryatts)
Species in EpeorusNumber of SpecimensNumber of Pictures
Epeorus albertaePink Lady45
Epeorus deceptivus00
Epeorus fragilis00
Epeorus frisoni426
Epeorus grandis13
Epeorus longimanusSlate Brown Dun23
Epeorus pleuralisQuill Gordon544
Epeorus punctatus00
Epeorus suffusus00
Epeorus vitreusSulphur1455

9 species aren't included.
Common Names
MatchCommon Name
***Little Maryatts
**Small Western Gordon Quills
**Yellow Quills
**Slate Maroon Drakes
**Slate Brown Duns
**Western Gordon Quills
**Pink Ladies
**Slate Cream Duns
Pictures Below ↓

This is page 4 of specimens of Epeorus. Visit the main Epeorus page for:

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

Pictures of 40 Mayfly Specimens in the Genus Epeorus:

Specimen Page:12345
Epeorus (Little Maryatts) Mayfly NymphEpeorus (Little Maryatts) Mayfly Nymph View 3 Pictures
Collected April 24, 2007 from Factory Brook in New York
Added to Troutnut.com by Troutnut on April 24, 2007
Male Epeorus frisoni Mayfly DunMale Epeorus frisoni Mayfly Dun View 2 PicturesI collected this male dun together with a female spinner, a female dun, and another male dun. I photographed this bedraggled one, larger than the other male, to show some of the greatest size variation within the species.
Collected September 6, 2006 from Mystery Creek #23 in New York
Added to Troutnut.com by Troutnut on October 3, 2006
Epeorus vitreus (Sulphur) Mayfly NymphEpeorus vitreus (Sulphur) Mayfly Nymph View 3 PicturesKey features I discerned with a microscope include that the femoral flange is blunt (later note: on nymphs of this size, it's somewhat ambiguous and the femora (
The femur of this Isonychia bicolor mayfly spinner is highlighted in red.
The femur of this Isonychia bicolor mayfly spinner is highlighted in red.
Femur: The main segment of an insect's leg close to the body, in between the tibia and the trochanter.) can be damaged in the collection process), the postero-lateral (Lateral: To the side.) spines have a longer anterior (Anterior: Toward the front of an organism's body. The phrase "anterior to" means "in front of."), the first gill is not extended, all gills are tracheated, and the femora (
The femur of this Isonychia bicolor mayfly spinner is highlighted in red.
The femur of this Isonychia bicolor mayfly spinner is highlighted in red.
Femur: The main segment of an insect's leg close to the body, in between the tibia and the trochanter.) have a distinctive brown spot on the center while all the other spots are gray.
Collected February 7, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Male Epeorus albertae (Pink Lady) Mayfly SpinnerMale Epeorus albertae (Pink Lady) Mayfly Spinner View 2 Pictures
Collected June 29, 2011 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on June 29, 2011
Male Epeorus albertae (Pink Lady) Mayfly SpinnerMale Epeorus albertae (Pink Lady) Mayfly Spinner View 1 Pictures
Collected June 29, 2011 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on June 29, 2011
Female Epeorus albertae (Pink Lady) Mayfly DunFemale Epeorus albertae (Pink Lady) Mayfly Dun View 1 Pictures
Collected June 29, 2011 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on June 29, 2011
Epeorus (Little Maryatts) Mayfly NymphEpeorus (Little Maryatts) Mayfly Nymph View 8 Pictures
Collected July 17, 2011 from the Gulkana River in Alaska
Added to Troutnut.com by Troutnut on July 20, 2011
Female Epeorus albertae (Pink Lady) Mayfly SpinnerFemale Epeorus albertae (Pink Lady) Mayfly Spinner View 1 PicturesIt is hard to see where the name "Pink Lady" comes from.
Collected June 29, 2011 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on June 29, 2011
Female Epeorus longimanus (Slate Brown Dun) Mayfly SpinnerFemale Epeorus longimanus (Slate Brown Dun) Mayfly Spinner View 1 PicturesI associated this female with a male I collected one night later. For a great and informative discussion of all Epeorus species and other mayflies be sure and read, WESTERN MAYFLY HATCHES by R. Hafele and D. Hughes. They rate all of the western mayflies and they rate the hatch of this genus a 25 out of a possible 45 points based on several rating criterion. They provide insect photos, possible fly patterns and fly presentations. This is a great book.
Collected July 24, 2011 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on July 25, 2011
Epeorus (Little Maryatts) Mayfly DunEpeorus (Little Maryatts) Mayfly Dun View 2 Pictures
Collected June 24, 2005 from the Vermillion River in Montana
Added to Troutnut.com by Bnewell on June 27, 2011
Specimen Page:12345
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