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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 Cahills12
CinygmulaDark Red Quills23125
EcdyonurusWestern Ginger Quills11
EpeorusLittle Maryatts47271
Heptagenia930
Ironodes13
Leucrocuta1158
MaccaffertiumMarch Browns and Cahills59270
Nixe113
Rhithrogena25118
Spinadis00
StenacronLight Cahills847
Stenonema16

3 genera aren't included.
Common Name
Pictures Below

This is page 20 of specimens of Heptageniidae. Visit the main Heptageniidae page for:

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

Pictures of 194 Mayfly Specimens in the Family Heptageniidae:

Specimen Page:1...18192021
Female Rhithrogena Mayfly SpinnerFemale Rhithrogena  Mayfly Spinner View 1 Pictures
Collected July 9, 2011 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on July 10, 2011
Female Rhithrogena virilis Mayfly DunFemale Rhithrogena virilis  Mayfly Dun View 6 PicturesI'm guessing this one is Rhithrogena virilis based on collection of a male spinner of similar size and body configuration during the same trip.
Collected June 16, 2018 from the South Fork Snoqualmie River in Washington
Added to Troutnut.com by Troutnut on June 23, 2018
Cinygmula (Dark Red Quills) Mayfly NymphCinygmula (Dark Red Quills) Mayfly Nymph View 3 Pictures
Collected May 10, 2008 from the Chena River in Alaska
Added to Troutnut.com by Troutnut on April 20, 2011
Rhithrogena Mayfly DunRhithrogena  Mayfly Dun View 1 Pictures
Collected March 27, 2010 from the Big Thompson River in Montana
Added to Troutnut.com by Bnewell on June 26, 2011
Male Cinygmula mimus Mayfly AdultMale Cinygmula mimus  Mayfly Adult View 1 Pictures
Collected May 20, 2012 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on May 25, 2012
Maccaffertium modestum (Cream Cahill) Mayfly NymphMaccaffertium modestum (Cream Cahill) Mayfly Nymph View 2 PicturesI looked at this nymph closely under my crappy microscope. It has truncate (Truncate: Cut off. This is often used to describe the square appearance of the gills of Maccaffertium mayfly nymphs, for example, as opposed to the pointed gills of the closely related genus Stenacron.) as opposed to rounded gills, postero-lateral (Lateral: To the side.) spines only on abdominal segments 7-9, and oblique crossbars through the center of each sterna, not on the posterior (Posterior: Toward the back of an organism's body. The phrase "posterior to" means "in back of.") edge like on some of the other Maccaffertium species. As best I can tell from the keys this is either modestum or ithaca and from the distribution maps I've seen I'm guessing it's modestum.
Collected March 10, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 19, 2006
Male Rhithrogena virilis Mayfly SpinnerMale Rhithrogena virilis  Mayfly Spinner View 8 PicturesI'm guessing this is Rhithrogena virilis based on resemblance to a similar specimen collected last year.
Collected June 16, 2018 from the South Fork Snoqualmie River in Washington
Added to Troutnut.com by Troutnut on June 23, 2018
Female Cinygmula mimus Mayfly SpinnerFemale Cinygmula mimus  Mayfly Spinner View 1 Pictures
Collected May 20, 2012 from the Touchet River in Washington
Added to Troutnut.com by Bnewell on May 25, 2012
Specimen Page:1...18192021
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