Mayfly Genus Heptagenia
Although still an important genus in its own right, Heptagenia no longer includes many of the key hatches it used to. Several important species have been moved to its sister genera Nixe, Leucrocuta, and Ecdyonurus.
(Heptagenia dolosa, Heptagenia flavascens, Heptagenia julia, Heptagenia marginalis, Heptagenia patoka, Heptagenia townesi)
Of the remaining species, the best hatches come from Heptagenia elegantula in the West. The genus is generally unimportant in the East and Midwest, where the most likely species to produce fishable hatches is Heptagenia pulla.Hatching BehaviorHeptagenia nymphs emerge very quickly, so emerger patterns are unimportant. The duns may or may not float long enough to get trout excited.Spinner BehaviorSpinner falls give the most promising action produced by Heptagenia species.
Pictures of 11 Mayfly Specimens in the Genus Heptagenia:
Recent Discussions of Heptagenia
Added more Heptagenia culacantha info 12 Replies »
Last reply on Feb 8, 2012 by Entoman
ReplyLink to pictures of H. culacantha 2 Replies »
I went to the entomology library today and photocopied the 1985 paper that first described this curious species. I've updated the culacantha page
with this information.
ReplyDoes anyone know anything about Heptagenia culacantha? 8 Replies »
Many thanks to user Softhackle for digging up this link. I knew about the thread from back when it started, but I wasn't able to find it when I went back to look last night. Good work!
Fly Fisherman Magazine forum topic
with two pictures of a H. culacantha
I've added the species to the "live" part of the database and put up a rudimentary page where I can compile any more information we find.
Last reply on Apr 18, 2007 by Konchu
This is a shot in the dark, but I'm trying to track down descriptive information about a rather rare "mystery mayfly." Heptagenia culacantha was identified in 1985 (Evans, Botts, & Flowers). About all I have right now is a tease from the Journal of the New York Entomological Society--"This infrequently taken species, one of the largest and most striking North American heptageniids, is known only from Pennsylvania and New York."Reply
The reason I'm so interested is that I believe I encounter a fishable hatch of these mayflies every season on one of my favorite PA brook trout headwaters. If that conjures a picture of fishing to 6-7" dinks, you'll need to double those numbers to appreciate how special this stream really is. Add to that an image of the fish rising to these beautiful "mystery mayflies" that hatch in the evening, following a day-long emergence of Dark Green Drakes (Litobrancha recurvata)!
It is such a special event that it is one of the very few things that can pull me away from fishing my favorite Olive Morning Dun hatch (Drunella lata, nee cornuta). Help!
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