Diagnosis
provided by World Register of Marine Species
Test elongate ovate, chambers one-half coil in length, quinqueloculine, five chambers visible from the exterior, subquadrate in section, slightly eccentric, the base of each chamber covering the end of the test, and the straight apertural end of the chamber resulting in the aperture being on one margin, chambers without a floor and lying against the previous whorl; wall calcareous, imperforate, porcelaneous; aperture large, with subparallel sides and everted rim, provided with a long slender tooth with short bifid termination. Oligocene (Rupelian) to Holocene; cosmopolitan. (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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