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Centroptilum bifurcatum - Anafroptilum bifurcatum - female

Centroptilum bifurcatum - Anafroptilum bifurcatum - Female
Healdsburg, Russian River, Sonoma County, California, USA
March 29, 2014
Size: 5 mm bl
Keyed to genus using Merritt, Cummins and Berg (2008). There are four species of Centroptilum recorded in California: C. album, C. asperatum, C. bifurcatum and C. conturbatum. All are recorded from the Russian River or it's tributaries. I've collected both nymphs and adults near Healdsburg and in the area I've collected from there appears to be only one species. I was able to eliminate C. album and C. conturbatum as both nymphs and adults using "Lowen, Robert G. and John F. Flannagan – Four Manitoba Species of Centroptilum Eaton (Ephemeroptera: Baetidae) With Remarks on the Genus (1991)" and "Webb, M. W. – The Mayflies of Sasketchewan. Thesis. University of Saskatchewan (2002)." The nymphs of C. asperatum are not described but I was able to exclude adult males using "Needham, Traver and Hsu - The Biology of Mayflies (1935). In addition, BOLD SYSTEMS has several photos of C. bifurcatum nymphs showing the dorsal patterning and they appear to match specimens I've collected. They can be seen at[tax]. More photos of C. bifurcatum nymphs can be seen in in bugguide at (1), (2), (3), (4) and (5).


Roger - I take it the taxonomists are playing silly buggers again. Only thing I could find was an abstract by Luke Jacobus. Can you refer me to any literature on the name change?
Thanks, Mark

Roger - Found the PDF by Jacobus and Wiersema, anything else I hould look for?

Hi Mark-

Although I wouldn't characterize them as "silly", a link to PDF of Jacobus/Wiersema paper appears on the INFO page for Anafroptilum. Nothing else (to look for) of which I'm aware.

Roger - I should have thought twice before I used that term. I know a great deal of hard work and thought went into the change in taxonomy. My apologies.

Moved from Centroptilum.

Thanks for creating a new species page for this Brady. I appreciate it. Mark

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