A redescription of the adult male of Caecognathia cryptopais (Barnard, 1925) (Crustacea: Isopoda: Gnathiidae) from southern Africa.

A redescription of the adult male of Caecognathia cryptopais (Barnard, 1925) is provided from syntypes and other material deposited in the South African Museum. The generic status of Caecognathia cryptopais is also revised. This redescription is based on light and scanning electron microscopy.