The new genus Barbaetis Waltz and McCafferty, and new species Barbaetis benfieldi Kennedy are described from larvae collected from the New River, Virginia. Barbaetis is easily told from Baetis by the presence of procoxal osmobranchia. Cladistics of B. benfieldi, related Pseudocloeon species, and the lutheri and pavidus complexes of Baetis are presented and indicate the need for further taxonomic revision. The habitat of B. benfieldi is described in terms of several ecological parameters. The new species demonstrates a univoltine life history with postembryonic development restricted to a short springtime period.
Waltz, R. D.; McCafferty, W. P.; and Kennedy, J H.
"Barbaetis: A New Genus of Eastern Nearctic Mayflies (Ephemeroptera: Baetidae),"
The Great Lakes Entomologist, vol 18
Available at: https://scholar.valpo.edu/tgle/vol18/iss4/8