Abstract
The genus Falsocis Pic is redescribed based on F. opacus Pic and F. brasiliensis sp. nov. an endangered Brazilian species. A key to males of the species of Falsocis is provided, together with a description of the external morphology of adults and of the morphology of male genitalia of both species. In addition, the female genitalia of F. brasiliensis sp. nov. are described. Falsocis is included in the tribe Ciini, and its relationship with Acanthocis Miyatake and other Ciidae genera is discussed. Falsocis brasiliensis sp. nov. is known from only three Atlantic Forest remnants, all surrounded by urban areas, pastures or agriculture, and is probably one of the most endangered Brazilian ciids.References
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