Themira athabasca n. sp. (Diptera: Sepsidae) with a Revised Key to North American Themira and Notes on the Sexual Morphology of Sympatric Species

Author: MANGAN ROBERT L.  

Publisher: Entomological Society of America

ISSN: 1938-2901

Source: Annals of the Entomological Society of America, Vol.69, Iss.6, 1976-09, pp. : 1024-1028

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Abstract

Themira athabasca n. sp. from Circle, Alaska is described, and a revised key to nearctic Themira is given. The sexual morphology and mating behavior of the sympatric arctic and midwestern U. S. species indicate that communities in these habitats demonstrate the parallel evolution of these characteristics. Sexual selection for mating efficiency is proposed as the evolutionary force responsible for the similarity of the communities.