Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Diagnosis Test enrolled in a trochospiral or planispiral coil, involute to evolute, commonly with many small chambers in numerous whorls; as new chambers are added septal flap attaches to previous apertural face and encloses radial canals, fissures, umbilical cavities, and intraseptal and subsutural canals; wall of perforate, hyaline calcite, generally optically radial in structure, or rarely hyaline oblique and optically granular; primary aperture single or multiple, interiomarginal to areal, may be absent on final chamber and only an intercameral foramen is present; small openings into the canal system may occur along the sutures but do not communicate with the chamber interior. U. Cretaceous (Coniacian) to Holocene. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]