Diagnosis
provided by World Register of Marine Species
Test ovoid in outline, compressed, periphery carinate, early stage quinqueloculine, later planispiral, with three chambers per whorl in the final whorls, chambers widest at the base, tapering toward the aperture; wall calcareous, imperforate, porcelaneous, surface ornamented with numerous longitudinal to slightly oblique fine costae; aperture at the end of the final chamber, circular, bordered by a narrow lip, and with a slender bifid tooth. Holocene; E. Pacific, Santa Barbara Island, off California, at 45 m to 50 m. (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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