Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin

Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

A trackless paradise two days deep in the Yellowstone backcountry

From Mystery Creek # 218 in Wyoming

Stream photos

Featured on the forum

Re: Trico emergers
In the Mayfly Genus Tricorythodes by Bwoklink (Martinlf replied)

Re: Trico Tips
In the Mayfly Genus Tricorythodes by Martinlf

Re: UV spectrum and trout
In General Discussion by Martinlf

Re: closing the gender gap in flyfishing
In General Discussion by Konchu (Smallflyguy replied)

Re: Fishing Kupa River, Slovenia
In Fishing Reports by Slocum (Fish1 replied)

Setvena wahkeena (Wahkeena Springfly) Stonefly Nymph Setvena wahkeena (Wahkeena Springfly) Stonefly Nymph

Dorsal view of a Setvena wahkeena (Perlodidae) (Wahkeena Springfly) Stonefly Nymph from Mystery Creek #199 in Washington

As far as I can tell, this species has only previously been reported from one site in Oregon along the Columbia gorge. However, the key characteristics are fairly unmistakable in all except for one minor detail:
— 4 small yellow spots on frons visible in photos
— Narrow occipital spinule row curves forward (but doesn’t quite meet on stem of ecdysial suture, as it's supposed to in this species)
— Short spinules on anterior margin of front legs
— Short rposterior row of blunt spinules on abdominal tergae, rather than elongated spinules dorsally
I caught several of these mature nymphs in the fishless, tiny headwaters of a creek high in the Wenatchee Mountains.

7 Recently Added Photos

27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.

Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.

I need your help to get some specimens of Caecidotea (Freshwater isopods).

Leonardo

México, D.F

Posts: 9

Leonardo on Jun 26, 2013June 26th, 2013, 9:04 am EDT

Hello everybody!

My name is Leonardo I´m biologist and i work with freshwater isopods of the genus Caecidotea.

Maybe someone already knows me, but my problem is this ...

To publish my research work about this genus i need some specimens from the type locality of Forge Creek Valley, Philadelphia.

I sent mails to many collections of crustaceans but they can not help me.

I hope someone on the forum can give me a little help, would be great.

Greetings from Mexico City!

Leonardo

México, D.F

Posts: 9

Leonardo on Jul 3, 2013July 3rd, 2013, 9:49 pm EDT

Please help me!!!!!

Martinlf

Moderator
Palmyra PA

Posts: 3047

Martinlf on Jul 12, 2013July 12th, 2013, 7:55 pm EDT

I don't know if anyone else has responded to Leo, but I collected some cress bugs from a small spring near my home and am sending them. All I could find were very small bugs, less than 5 mm in length. He may need some bigger bugs, so if anyone near one of the larger spring creeks can touch base with him, he has offered to pay postage. He doesn't have to have bugs from Valley Creek, but from any stream in PA. He's having me send the bugs to a colleague at Texas A&M in Galveston who travels to Mexico and who will take the bugs to Leo. Please PM him if it's convenient to send him some other samples. He can PM you the address. His colleague is going to Mexico in about two weeks.

"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell

Erika
Posts: 1

Erika on Jun 1, 2016June 1st, 2016, 6:57 am EDT

Leonardo: Did you get isopods? I am in Allentown, and could send you some (especially from Cedar Creek, which runs through Allentown). I'd be thrilled if you could help in identifying our local species. . . call it reciprocity! Question though: I thought Caecidotea was in the ponds around here, and our stream species was Lirceus. Does Caecidotea occur in streams as well? Easiest is to email me a response and we can coordinate:
iyengar@muhlenberg.edu
NOTE: Allentown is north of Philadelphia by about 90 minutes.
I could likely get down to the Philly area to collect in the fall--but you'd need to send me GPS information re: Forge Creek Valley, because I don't know where that is.

Erika

Crepuscular

Boiling Springs, PA

Posts: 920

Crepuscular on Jun 1, 2016June 1st, 2016, 7:33 am EDT

Erika, I'm not sure if you noticed but this thread is 3 years old. If you need your local species identified, I can probably help. I think he meant Valley Creek in Valley Forge. The discussion about the type specimen is in Williams 1970.

Eric