WoRMS taxon details
From editor or global species database
Diagnosis Test trochospiral, planoconvex, evolute and convex spiral side with central umbonal thickening, umbilical side flat and involute, about ten chambers in the final whorl, sutures distinct, thickened, flush, strongly arched, and curving back at the periphery, with short but distinct retral processes, periphery subacute to carinate; wall calcareous, finely perforate; aperture a row of pores at the base of the apertural face. Pliocene; Japan. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
From editor or global species database
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