Some of our forum members who share my bug-geeky tendencies will be interested to know that Konchu (Luke Jacobus) has recently published a worldwide revision of the Ephemerellinae. I recently made a passing reference to his work in another thread ("changing water level"). From a fly-fishing perspective, this group includes some of our most famous and important mayflies. Most of the scientific names for famous fly-fishing hatches remain relatively unchanged (a relief for those who dislike learning new names), but there are some subtle changes and new names for a few hatches that are less famous.
Here are a few notes about species important to (North American) fly fishers:
Hendrickson (east/central)--still Ephemerella subvaria
Large Sulphur/PED (east/central)--still Ephemerella invaria
. Konchu notes that further research and clarification is needed for this species/complex (incorporating the former E. rotunda
Small Sulphur/PED/PMD (east/west)--still Ephemerella dorothea
, though (as I read it) E. infrequens
is listed as a synonym rather than a subspecies. The need for further research is also indicated for this species/complex. (The other PMD, E. excrucians
, is unchanged, still synonymous with E. inermis
Olive Morning Duns/BWOs (east)--Previously synonymized with Drunella lata
, the former species cornuta
have been reinstated to full species status. The status of D. longicornus
is uncertain, and more research is indicated in order to further clarify this group.
Western Green Drakes (west)--Drunella doddsii
continue to be the names of the famous large WGDs, and Drunella flavilinea
is unchanged for the small WGD or "Flav."
Little Black Quill/Darth Vader (east)--Not as famous as some in this group, this distinctive little black species is widespread and often important. Formerly Serratella deficiens
, it is now Teloganopsis deficiens
. It is the only Nearctic representative of this mostly Palearctic/Oriental genus.
Large Leggy Sulphur (east)--Although this species is not well known (and possibly not very important to fly fishers), it has been discussed on this site, and Jason has photographed it. Formerly Ephemerella septentrionalis
, it is now Penelomax septentrionalis
. This new genus is monotypical.
You can find a link to an overview of this revision (along with other useful/interesting info) on Konchu's website: http://mypage.iu.edu/~lmjacobu/mayfly.html
I'm sure he would be willing to answer any questions that members might have about this revision/group.