As Mimachlamys famigerator Iredale 1925.
Small flattened, ears unequal, suborbicular, sculpture peculiar; shell colour variable, shades of yellow and orange, sometimes pinkish, variegated with white or paler blotches or streaks, internally similarly coloured; sculpture of about 24 radial ribs, a little flattened and unadorned at first, then developing lamellae in a discrepant manner on the left valve, more regularly on the right, which is a little more convex; on left valve, lamellae occur on every third or fourth rib, intervening ribs remaining smooth; at a little older stage the ribs on right valve are regularly surmounted by smaller scaly lamellae, the broad interstices are at first concentrically lined, but the sculpture becomes irregular and broken with age, and intercalating ribs spring up; hinge line straight, narrow, right valve with long ridge bearing minute serration on each side of small ligament pit, with corresponding serrated groove in left valve; ears, in the valve the posterior auricle is small, with four wavy radials not much sculptured; the anterior auricle is large, with six radials crossed with erect scales, ctenolium deep; the left valve has the ears unequal, the anterior large with nine radials, distantly scaled, posterior small, with five similarly ornamented radials. Right valve, length 14 mm, height 15 mm.; left valve, length 16 mm, height 17 mm. Type locality: off Green Cape, New South Wales, 50-70 fathoms. Loc.: Beachport to Albany, 40-200 fathoms. S.W.A, S.A, Tas, Vict, N.S.W.