Shell minute, thin, semi-transparent, white, moderately convex, obliquely oval, anterior end produced. Surface glossy, but crowded with fine concentric striations. Valve margins smooth. Prodissoconch moderately large, circular, with a rounded margin and a prominent boss in the middle. Hinge typical, except that it lacks the hooked process on the posterior cardinal of the left valve. Left valve with three cardinals, a long prominent anterior one and a pair of short posterior teeth, the uppermost the larger, confluent with the valve margin and terminating at the chondrophore in a slight swelling. Right valve with three cardinals, a long slender anterior one near to the valve margin, a shorter and much heavier one beneath, and a single short anterior tooth. In this genus modifications in respect to position, shape and strength of the hinge teeth are brought about by the relative obliquity of the shell shape.
Length, 1.15 mm.; height, 1.2 mm. Holotype: In Auckland Museum.
Locality: Old Neck Beach, Paterson Inlet, Stewart Island, in beach drift (A.W.B.P., Nov., 1934).
The species resembles a Pachykellya in shape except for the prodissoconch.