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Mayfly Family Heptageniidae (March Browns, Cahills, Quill Gordons)

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» Family Heptageniidae (March Browns, Cahills, Quill Gordons)
Genus in HeptageniidaeNumber of SpecimensNumber of Pictures
CinygmaWestern Light Cahills00
CinygmulaDark Red Quills00
EcdyonurusWestern Ginger Quills00
EpeorusLittle Maryatts09
Heptagenia00
Ironodes00
Leucrocuta00
MaccaffertiumMarch Browns and Cahills01
Nixe00
Rhithrogena00
StenacronLight Cahills00
Stenonema00

4 genera aren't included.
Common Name


Pictures Below

This is page 17 of specimens of Heptageniidae. Visit the main Heptageniidae page for:

  • The behavior and habitat of Heptageniidae.
  • 11 underwater pictures of Heptageniidae.

Pictures of 215 Mayfly Specimens in the Family Heptageniidae:

Specimen Page:1...161718...23
Male Cinygmula (Dark Red Quills) Mayfly SpinnerMale Cinygmula (Dark Red Quills) Mayfly Spinner View 7 PicturesThis male was collected from the same cloud of spinners as this female and is probably the same species. I'm tentatively calling them both Cinygmula for now, but I'm really not sure about that ID yet.
Collected August 17, 2018 from Rock Creek in Montana
Added to Troutnut.com by Troutnut on June 13, 2019
Female Maccaffertium (March Browns and Cahills) Mayfly DunFemale Maccaffertium (March Browns and Cahills) Mayfly Dun View 6 PicturesI collected this female dun together with a male. She's fairly damaged but at least you can see the colors.
Collected May 27, 2005 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on May 22, 2006
Male Rhithrogena hageni (Western Black Quill) Mayfly SpinnerMale Rhithrogena hageni (Western Black Quill) Mayfly Spinner View 15 PicturesI collected this spinner from the trail (old logging road) above a whitewater canyon on a small stream in the Cascades. I'm fairly positive on the ID: in Traver 1935 it keys out to Rhithrogena doddsi, which is now a synonym (Synonym: A former name of a taxon, usually a species. Entomologists frequently discover that two insects originally described as different species are one in the same, and they drop one of the names. The dropped name is said to be a synonym of the remaining name. These changes take a while to trickle into the common knowledge of anglers; for example, Baetis vagans is now a synonym of Baetis tricaudatus.) of Rhithrogena hageni. The penes (Penes: The paired genital structures of most male insects, which vary widely in form and are one of the main characteristics used for species identification.) differ slightly from the drawing in that book, but they're a very close match to drawing from the original hageni description in Eaton 1885.

I'm using its ID to put a species ID on a female dun and mature nymph collected on the same trip. I'm also using this one's ID for a specimen with seemingly identical reproductive anatomy from Montana.

Lastly, I have included here a couple pictures of the genitalia of a different specimen collected on the same evening, from the same river, and I think even the same swarm (although I don't recall that 100 %). They're angled a bit differently, and I couldn't locate the mid-ventral (Ventral: Toward or on the bottom.) spines, but I'm guessing I'm just seeing intra-species variation.
Collected July 4, 2020 from Mystery Creek #249 in Washington
Added to Troutnut.com by Troutnut on July 12, 2020
Specimen Page:1...161718...23
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