From editor or global species database
Diagnosis Test circular in outline, trochospiral, two and a half to three whorls, concavoconvex, spiral side evolute and convex, chambers low and broad, sutures oblique and depressed, only the five to eight chambers of the final whorl visible on the flattened umbilical side where they appear subtriangular, sutures radial around the closed umbilicus, periphery angular but noncarinate; wall calcareous, thin and transparent, optically radial, finely perforate, surface smooth; aperture a nearly equatorial vertical slit in a low depression, extending up the apertural face of the final chamber on the umbilical side. Oligocene to Holocene; cosmopolitan. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
From editor or global species database