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Mayfly Genus Epeorus (Little Maryatts)

Taxonomic Navigation -?-
» Genus Epeorus (Little Maryatts)
Species in EpeorusNumber of SpecimensNumber of Pictures
Epeorus albertaePink Lady00
Epeorus deceptivus00
Epeorus fragilis00
Epeorus frisoni00
Epeorus grandis00
Epeorus longimanusSlate Brown Dun00
Epeorus pleuralisQuill Gordon00
Epeorus punctatus00
Epeorus suffusus00
Epeorus vitreusSulphur00

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


Pictures Below ↓

This is page 5 of specimens of Epeorus. Visit the main Epeorus page for:

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

Pictures of 52 Mayfly Specimens in the Genus Epeorus:

Specimen Page:1...3456
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
Female Epeorus vitreus (Sulphur) Mayfly DunFemale Epeorus vitreus (Sulphur) Mayfly Dun View 4 Pictures
Collected June 8, 2005 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on May 26, 2006
Epeorus deceptivus Mayfly NymphEpeorus deceptivus Mayfly Nymph View 8 PicturesGills #1 failing to meet at the center sterna combined with a lack of small dark single spots mid-femur (
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.) are characters that differentiate Epeorus deceptivus from Epeorus longimanus.
Collected July 17, 2011 from the Gulkana River in Alaska
Added to Troutnut.com by Troutnut on July 20, 2011
Male Epeorus (Little Maryatts) Mayfly DunMale Epeorus (Little Maryatts) Mayfly Dun View 7 PicturesThis Epeorus dun managed to emerge successfully even though it had apparently long several legs at some point and only partially grown them back.
Collected May 15, 2007 from the West Branch of the Delaware River in New York
Added to Troutnut.com by Troutnut on May 18, 2007
Epeorus longimanus (Slate Brown Dun) Mayfly NymphEpeorus longimanus (Slate Brown Dun) Mayfly Nymph View 9 Pictures
Collected July 4, 2020 from Mystery Creek #249 in Washington
Added to Troutnut.com by Troutnut on July 12, 2020
Male Epeorus (Little Maryatts) Mayfly DunMale Epeorus (Little Maryatts) Mayfly Dun View 6 Pictures
Collected May 28, 2007 from Mystery Creek #42 in Pennsylvania
Added to Troutnut.com by Troutnut on June 4, 2007
Male Epeorus (Little Maryatts) Mayfly SpinnerMale Epeorus (Little Maryatts) Mayfly Spinner View 6 Pictures
Collected May 28, 2007 from Mystery Creek #42 in Pennsylvania
Added to Troutnut.com by Troutnut on June 4, 2007
Female Epeorus vitreus (Sulphur) Mayfly SpinnerFemale Epeorus vitreus (Sulphur) Mayfly Spinner View 4 Pictures
Collected May 28, 2007 from Mystery Creek #42 in Pennsylvania
Added to Troutnut.com by Troutnut on June 4, 2007
Male Epeorus albertae (Pink Lady) Mayfly SpinnerMale Epeorus albertae (Pink Lady) Mayfly Spinner View 12 PicturesThis spinner appeared inside our car after a rest stop overlooking the Snake, so that's most likely where it came from. Two different keys place it firmly in Epeorus albertae.
Collected August 23, 2020 from the Snake River in Idaho
Added to Troutnut.com by Troutnut on September 18, 2020
Female Epeorus vitreus (Sulphur) Mayfly SpinnerFemale Epeorus vitreus (Sulphur) Mayfly Spinner View 3 PicturesI collected this one as a dun, and she molted into a spinner in my room.
Collected May 26, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Specimen Page:1...3456
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