Troutnut.com Fly Fishing for Trout Home
User Password
or register.
Scientific name search:

> > Does anyone know anything about Heptagenia culacantha?



This topic is about the Mayfly Species Heptagenia culacantha

This species is not known to be important to anglers. It is noteworthy for its relatively recent discovery, its large size, and the striking coloration of its nymphs and duns. They are sometimes called Tiger Mayflies.

This is the largest species of Heptagenia on the continent, and it's also one of the largest in the entire Heptageniidae family. Nymphs and adult females have been collected with bodies up to a size of 19.5mm, a little over 3/4" long. Read more...

The Discussion

GONZOOctober 19th, 2006, 8:25 pm
Site Editor
"Bear Swamp," PA

Posts: 1681
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."

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!
TroutnutOctober 19th, 2006, 10:11 pm
Administrator
Bellevue, WA

Posts: 2592
I've seen a picture. A dun from the Delaware was photographed and posted on the Fly Fisherman forum for an ID contest. It was posted (and maybe taken? I forget) by a guy who works at one of the fly shops downtown in Hancock, NY. I have his business card somewhere, and I'll see if I can find it and email him for the picture.

I remember that the dun was large and unusually "pudgy" for a Heptagenia mayfly, and it was a striking yellow color. Beyond that I can't remember.

Here's the citation for the paper in which the discovery of this species was announced: Evans, J.L., Botts, W.F. Jr. and R.W. Flowers. 1985. A new Heptagenia (Ephemeroptera: Heptageniidae) from the Susquehanna and Delaware Rivers from eastern North America. Annals of the Entomological Society of America 78: 5-7.

I don't have it yet, but it's near the top of my to-get list. I know it's in the Cornell entomology library, so I'll photocopy it next time I'm there.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
GONZOOctober 19th, 2006, 10:27 pm
Site Editor
"Bear Swamp," PA

Posts: 1681
Thanks Jason! Your recollection of a large fly with a "striking yellow color" helps.

P.S.--If you could manage to locate the 1984 O. S. Flint paper on Brachycentrus when you're at Cornell, that would be awesome! I have some questions about B. solomoni.
SofthackleOctober 20th, 2006, 5:55 pm
Site Editor
Wellsville, NY

Posts: 540
Gonz,

NatureServe Link

Fly Fisherman Magazine Forum Link

These are a few places to look. As Jason has said the second is the Fly Fisherman Mag site, but it's got a couple photos.

I'd get in touch with someone in your area in your fish and wildlife service that might be able to assist you in getting more info on this species, and if in fact, it is what you think it is. Good luck in your quest, and keep us posted on your progress.

Mark
"I have the highest respect for the skilled wet-fly fisherman, as he has mastered an art of very great difficulty." Edward R. Hewitt

Flymphs, Soft-hackles and Spiders: http://www.troutnut.com/libstudio/FS&S/index.html
TroutnutOctober 20th, 2006, 6:41 pm
Administrator
Bellevue, WA

Posts: 2592
Thanks SoftHackle.

The links were stretching the forum (my text-parsing code is not without its flaws) so I edited to make them shorter, live links.

In response to this discussion I've added H. culacantha to the live part of the site and reposted the photo link in a topic there. I'll be interested to see if that's the fishable hatch Gonzo found or not.

I wouldn't be too optimistic about state natural resource agencies being helpful on mayfly species IDs. They mainly use invertebrates for biomonitoring and that rarely requires identification beyond the genus level. Reliable species IDs for obscure species are much harder and require a whole library of papers or an experienced entomologist. You're more likely to have luck with a local university's biology or entomology department, I would think.

Of course, the guys who do invertebrate sampling for the state are more likely than most to be fly fishermen and bug hobbyists, in which case they might know more than their job requires. Maybe you'd luck out.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
GONZOOctober 21st, 2006, 9:33 am
Site Editor
"Bear Swamp," PA

Posts: 1681
Jason and Mark, many thanks for your help! The photos were all I needed. I'll be on the lookout for this spectacular mayfly. From the size, color, and markings, it is certainly one I will recognize on sight. It is definitely not the species in question, however. :(

My mystery mayfly is unquestionably a member of the Heptageniidae, but I think I will have to return to my previous search of Maccaffertium/Stenacron species for an answer. Initially, I assumed it was a large and unusually bright version of S. interpunctatum, but I have only played catch-and-release with a few specimens in the field. Next year, I'll have to keep a few in order to be certain.

Until then, the quest goes on. Thanks aqain.
BoyleApril 17th, 2007, 8:56 pm
Cooperstown, NY

Posts: 2
The first time I ever heard of the mayfly now known as Heptegenia culacantha came years ago, probably in the late 1970s or very early 80s,when Paul Schmookler, who collected aquatic insects professionally, showed me a color photograph of an unusually large and patterned nymph that he had discovered in the Delaware River and called the "tiger mayfly." Scientific protocol, so I understand, holds that a new species pf insect can only be named and described as an adult, not as a nymph. Given Paul's zealous explorations, I am quite certain that he was the first person ever to encounter Heptagenia culacantha.
TroutnutApril 17th, 2007, 9:43 pm
Administrator
Bellevue, WA

Posts: 2592
Neat, Boyle. Thanks for the background. I would love to collect one of these nymphs, but I'm sure it would take a lot of luck.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
KonchuApril 18th, 2007, 4:37 am
Site Editor
Indiana

Posts: 498
Often new species (sometimes even genera and families) of mayflies or other inverts are described based on only a single stage; however, many taxonomists are reluctant to do so unless they have at least a larva and male adult (in the case of mayflies). Sometimes this is practical; other times it is not. Ex: species is from NY & PA - practical. Species is from a remote part of a certain hot country with a lot of sand - not practical.

Thanks for some of the inside story on H. culacantha, Boyle.

Quick Reply

You have to be logged in to post on the forum. It's this easy:
Username:          Email:

Password:    Confirm Password:

I am at least 13 years old and agree to the rules.

Related Discussions

TitleRepliesLast Reply
Re: Mayfly hatch in aquarium - Leptophlebiidae?
In the Identify This! Board by LowBudget
4Apr 12, 2014
by Brookyman
Re: Heptageniidae?
In the Identify This! Board by Willmilne
5May 19, 2009
by GONZO
Re: Pennsylvania Pickerel
In General Discussion by Baron
9Jul 1, 2019
by Baron
Re: Another sulphur for comment
In Female Ephemerella invaria Mayfly Dun by Martinlf
1Aug 21, 2007
by Gene
Re: Shawn's Cicada Ties
In the Photography Board by Shawnny3
4May 19, 2007
by Martinlf
Re: Unidentified Colorado Front Range Nymphs.
In the Identify This! Board by DangerAF1
2Apr 20, 2020
by DangerAF1
Re: Mayflies which crawl underwater to lay their eggs
In General Discussion by Troutnut
1Jul 22, 2006
by Taxon
Re: BWO at last!
In Female Baetis Mayfly Dun by CaseyP
3Nov 15, 2009
by RedQuill27
Re: 18-inch Hex hatch smallmouth!
In the Photography Board by Jmd123
3Jul 2, 2011
by Jmd123
Re: Darth Vader???
In the Identify This! Board by Freepow
3Jun 12, 2008
by Shawnny3
Most Recent Posts
Yea...
In the Mayfly Species Ephoron leukon by Imaxfli
Re: Fall ISO's - Au Sable
In General Discussion by Brian314 (Partsman replied)
Tippet for Doug
In Gear Talk by Martinlf
Re: TMC 518 size 32 hooks
In Fly Tying by Dbarr15 (Martinlf replied)
Re: some fish taken on a modern streamer
In Fishing Reports by Partsman (Jmd123 replied)