Eubriine Psephenidae occur in most regions of the world.
Air is obtained through anal gill tufts, which are extruded when the operculum is opened.
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. Median epicranial region without longitudinal furrow.