Diagnosis
provided by World Register of Marine Species
Test tiny, trochospiral, biconvex, more convex spiral side with broad low chambers and oblique sutures, five to six chambers in the final whorl, umbilical side with depressed and closed umbilicus and depressed and radial sutures, periphery rounded; wall calcareous, hyaline, surface smooth; aperture a minute, slitlike interiomarginal and extraumbilical opening on the umbilical side. Holocene; Antarctic. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification)
Loeblich, A. R.; Tappan, H. (1987). Foraminiferal Genera and their Classification. Van Nostrand Reinhold Company, New York. 970pp.
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