Diagnosis
provided by World Register of Marine Species
Test trochospiral with about two and a half whorls, planoconvex, spiral side convex, umbilical side flattened and umbilicate, chambers enlarging slowly as added, about nine in the final whorl, sutures flush to slightly depressed, strongly oblique on the spiral side, curved and radial on the umbilical side, periphery subangular; wall calcareous, hyaline, finely perforate, surface smooth; aperture a low interiomarginal arch midway between the umbilicus and periphery, supplementary apertures on the umbilical side consist of one or two rounded to ovate openings per chamber, aligned parallel to the periphery, in line with the primary aperture and progressively larger in later chambers. Holocene; Pacific Ocean: Paumotu Island. (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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