A Revision of the Genus Ephemerella (Ephemeroptera: Ephemerellidae) II. The Subgenus Caudatella1

Abstract

Until recently there has been considereable confusion as to the characterization of the mayfly groups recently named by Edmunds (1959) as the subgenera Attenuatella and Dannella. Characters of the adult male and nymphal stages of the subgenus are described. A key distinguishing 4 spp. by characters of the male imagoes and nymphs is given. Notes on distribution, taxonomy and biology are also given