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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 Quills1478
EcdyonurusWestern Ginger Quills11
EpeorusLittle Maryatts40214
Heptagenia728
Ironodes13
Leucrocuta951
MaccaffertiumMarch Browns and Cahills60279
Nixe113
Rhithrogena1648
StenacronLight Cahills848
Stenonema16

4 genera aren't included.
Common Name
MatchCommon Name
****March Browns, Cahills, Quill Gordons
Pictures Below ↓

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

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

Pictures of 165 Mayfly Specimens in the Family Heptageniidae:

Specimen Page:1...345...18
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 Maccaffertium terminatum Mayfly SpinnerFemale Maccaffertium terminatum Mayfly Spinner View 5 PicturesI was able to identify this female because I captured her while she was mating with an identifiable male.
Collected June 7, 2007 from the West Branch of the Delaware River in New York
Added to Troutnut.com by Troutnut on June 8, 2007
Male Epeorus pleuralis (Quill Gordon) Mayfly DunMale Epeorus pleuralis (Quill Gordon) Mayfly Dun View 9 Pictures
Collected May 7, 2005 from the Beaverkill River in New York
Added to Troutnut.com by Troutnut on May 16, 2006
Maccaffertium mediopunctatum (Cream Cahill) Mayfly NymphMaccaffertium mediopunctatum (Cream Cahill) Mayfly Nymph View 4 Pictures
Collected June 8, 2005 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on May 26, 2006
Male Maccaffertium terminatum Mayfly SpinnerMale Maccaffertium terminatum Mayfly Spinner View 11 PicturesI positively identified this specimen under a microscope with a good key. It was one of the more common species in a generally light mixed bag of mayflies over a big Catskill tailwater last night.

I swooped this one out of the air while it was mating with a female, so I can be certain about her ID as well.
Collected June 7, 2007 from the West Branch of the Delaware River in New York
Added to Troutnut.com by Troutnut on June 8, 2007
Male Nixe inconspicua Mayfly DunMale Nixe inconspicua Mayfly Dun View 13 PicturesThis pretty little dun was part of a sparse midsummer evening hatch on a large Catskill river.

I could not identify it by following a species key step by step, but I tentatively keyed it to the genus Nixe, and based on distribution maps and physical descriptions the most likely species is Nixe inconspicua.
Collected July 13, 2005 from the East Branch of the Delaware River in New York
Added to Troutnut.com by Troutnut on April 14, 2006
Female Stenacron (Light Cahills) Mayfly DunFemale Stenacron (Light Cahills) Mayfly Dun View 3 Pictures
Collected July 31, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Epeorus vitreus (Sulphur) Mayfly NymphEpeorus vitreus (Sulphur) Mayfly Nymph View 6 Pictures
Collected February 7, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Female Cinygmula ramaleyi (Small Western Gordon Quill) Mayfly DunFemale Cinygmula ramaleyi (Small Western Gordon Quill) Mayfly Dun View 7 PicturesThis dun is almost certainly of the same species as this nymph, as it hatched in my cooler from a nearly identical nymph.
Collected July 10, 2011 from Nome Creek in Alaska
Added to Troutnut.com by Troutnut on July 13, 2011
Female Rhithrogena Mayfly SpinnerFemale Rhithrogena Mayfly Spinner View 9 PicturesI'm very tentatively (see the connected forum thread) sticking this mayfly in Rhithrogena for now.
Collected June 7, 2007 from the West Branch of the Delaware River in New York
Added to Troutnut.com by Troutnut on June 8, 2007
Specimen Page:1...345...18
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