A New Genus and Species of Limnephiline Trichoptera from the Far East of the U.S.S.R. (Trichoptera: Limnephilidae)

Summary

Single male and female specimens of a limnephilid caddisfly found in the collections of the Zoological Institute, Leningrad, had been identified by A.V. Martynov as of a new genus and species. The specimens bore no name, nor evidently were they mentioned in the literature. The name Lepnevaina gen. nov. signata sp. nov. is proposed. The new genus belongs to the Limnephilinae, but the characters are highly aberrant. In the male, extraordinary development of the superior appendages, and loss of all but a vestige of the intermediate appendages, result in genitalic morphology that shows affinity with no other genus in the Limnephilinae. In the female, segments IX and X are unusually short, and the vulval lobes circular and enlarged. A prominent ovoid setal wart on the frons is distinctive in both sexes. Evidence for relationships is reviewed, and the genus assigned provisionally to the tribe Limnephilini.