(Borgert)
Diagnosis: Shell asymmetrically flattened, nearly circular or subcircular in side view or somewhat wider than long, smooth, without spines on the aboral pole. Oral main leg simply pointed, chambered, somewhat longer than shell length, more or less strongly bent, with long lateral branch on convex side near mouth. Three short oral spines, pointed, divergent, tooth-shaped, developed from mouth rim. Sometimes the oral spines also bear a narrow lateral branch projecting obliquely or nearly horizontally.
Length: 0.085-0.096 mm.