Borgert
Diagnosis: Shell nearly circular or ovate, with dissimilar surface curvature, smooth. With one stronger, chambered, bent leg, nearly as long as shell diameter, distally tapered, with outwardly directed point, with 2 thin, pointed lateral spines on the convex side, the one nearest the shell significantly longer. Mouth also with a number of narrower spines, usually 3 larger and often longer, wavy, outwardly bent (nearly horizontal), remaining ones shorter thorns between the larger ones.
Length: 0.110-0.116 mm.