Diagnosis
provided by World Register of Marine Species
Test tiny, about 0.2 mm in diameter, low trochospiral coil, planoconvex and bi-involute, convex spiral side with lunate chambers and depressed sutures that curve back at the periphery, concave umbilical side with very strongly curved sutures, seven chambers in the final whorl, periphery rounded, peripheral outline lobulate; wall calcareous, finely perforate, surface smooth on the spiral side except for a slightly elevated row of large perforations, umbilical side more coarsely perforate and surface distinctly granular; aperture interiomarginal, nearly equatorial but slightly on the umbilical side, spiral side with a prominent band of coarse pores on each chamber adjacent to the suture. Holocene, at 20 m to 40 m; Philippines. (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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