Foraminifera taxon details
From editor or global species database
Diagnosis Test planoconvex, circular in outline, trochospiral, spiral side convex with all whorls visible and only a few crescentic chambers per whorl, only the four to five chambers of the final whorl visible around the small open umbilicus on the umbilical side, sutures curved and limbate on the spiral side, radial and depressed on the umbilical side, periphery carinate; wall calcareous, aragonitic, lamellar, finely perforate, surface may be somewhat pitted on the spiral side, smooth and polished on the umbilical side; aperture slitlike, umbilical, with a median loop, intercameral foramen oval, near the base of the septum above a short transverse intercameral plate. M. Jurassic (Bajocian) to U. Jurassic (Kimmeridgian); Poland; England; USSR: Lithuania. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
From editor or global species database
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