Psephenoides occurs in Asia, while Afropsephenoides is known from Africa.
Air is obtained through anal gill tufts, which are extruded when the operculum is opened.
The immature stages of Psephenoides gahani , Champ. An illustrated synopsis of the principal larval forms of the order Coleoptera. Length less than 3 mm, or 3 to 15 mm. Vestiture including bristles, scales, expanded or complex hairs. Ventral surfaces very lightly pigmented.