Mayfly Genus Serratella
Prior to recent revisions, this genus of elegant little dark mayflies with their small dark bodies, dark slate wings, and paler legs and tails was more important to anglers. What was the East's most significant species is now known as Teloganopsis deficiens (Little Black Quill). The only remaining species reported of value to the eastern angler is Serratella serrata (Little Sooty Olive).
5 species aren't included.
These changes have had an even bigger impact in the West. The significant Summer hatching tibialis has been moved back to its old genus and is again called Ephemerella tibialis (Small Western Dark Hendrickson). The next most prominent species (though of only minor importance) is now called Matriella teresa and is the only recognized species of that genus in North America. The very minor species velmae has also been moved, and is now back in Ephemerella. This leaves only a few western species in this genus, and they are of no reported significance to anglers.
Pictures of 3 Mayfly Specimens in the Genus Serratella:
Male Serratella micheneri (Little Western Dark Hendrickson) Mayfly Nymph
View 9 PicturesThis specimen has tarsal claws (Tarsal claw: The claws at the tip of the tarsus, on an insect's "foot.") with 7 denticles (
Denticle: Small tooth-like projects, often appearing like serrations on the tarsal claws of certain mayfly nymphs.) and tubercles (
The denticles on the tarsal claw of this Ephemerella
nymph are highlighted in red.
Tubercle: Various peculiar little bumps or projections on an insect. Their character is important for the identification of many kinds of insects, such as the nymphs of Ephemerellidae mayflies.) on abdominal segments 4-7 only. It keys to Serratella micheneri, as do some other specimens from the same collection that lacked the dorsal (Dorsal: Top.) stripe.
A few (not all) of the abdominal tubercles on this Ephemerella needhami
nymph are circled. They are especially large in this species.
Recent Discussions of Serratella
Flightless Mayfly?? 8 Replies »
In "Splitting Cane", Ed Engle refers to the "elusive flightless Serratella mayfly" - does anyone know if this was a joke, or if there is such a thing? "Mayflies" by Knopp & Cormier certinaly does not mention such a beast.ReplyLearning to Use the Force 6 Replies »
Went over to the Dark Side the past two days. Thanks to all who helped. By the way, Jason, fished spinners also. ReplyEmerger 6 Replies »
Last reply on Jun 11, 2009 by GONZO
Does anyone know the color of the emerging/freshly emerged dun? ReplySerratella 1 Reply »
Posted by Goose
on Oct 4, 2006
Jason: I was fishing in Central PA with a buddy on Sunday and we collected 2 different BWO species from the water. A really small one, about 22 to 24, had an olive/gray body. The other, which was about a size 20, had a gray body and thorax and was matched well with natural beaver fur. I don't know the names, of course, but I saw them with my own eyes. We did well fishing an emerger/dun pattern in sizes 20 and 22. We tied some with trailing shucks of amber or dun. We used a light olive thread for the body, sparse gray beaver dubbing for the thorax, and dun snow shoe for the wing.Reply
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