Adult female (as observed in specimens preserved in alcohol) broadly oval (fig. 1, b, c), strongly convex (fig. 1, a), circular under compression; divisions of segments indicated on the dorsum by moderately deep transverse furrows: marginal area tumescent, overlapping the ventral area (fig. 1, b). Colour (of alcoholic material) ochreous, brownish, or olivaceous, very thinly powdered with white mealy secretion.