Diagnosis
provided by World Register of Marine Species
Test tiny, planoconvex, with five or six low trochospiral whorls of seven to nine chambers each, chambers very broad and low as seen on the strongly convex spiral side, aligned with those of the preceding whorl and appearing triangular, with straight and radial sutures around the depressed umbilicus on the umbilical side, spiral suture flush, septal sutures strongly elevated and costate on the spiral side, depressed on the umbilical side and bordered on each side by an elevated poreless margin, periphery sharply angled; wall calcareous, thickened, and with smooth poreless surface between the carinate radial sutures on the spiral side, surface on the umbilical side appearing finely microreticulate with a few scattered pores; aperture obscure. Oligocene to Holocene; USA: Mississippi; Sahul Shelf, Northwest Australia. (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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