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Proceedings of the Entomological Society of Washington

The original placement of Thrassis peninsularis Lewis, 1994, is discussed in the light of the diagnostic characters of the genus Thrassis Jordan 1933. It is concluded that the taxon was originally misplaced and it should be placed in its own genus, namely Parathrassis, n. gen. Diagnostic characters which set this new genus apart are enumerated, and Thrassis peninsularis is designated its type species. Parathrassis peninsularis is a new combination.

The Status of Thrassis peninsularis Lewis, 1994 (Siphonaptera: Ceratophyllidae) from Baja California, Mexico