Diagnosis
provided by World Register of Marine Species
Test ovate in outline, slightly flattened, with truncate periphery, early chambers in quinqueloculine arrangement, later added in a single plane on alternate sides as in Spiroloculina; wall calcareous, imperforate, porcelaneous, surface with longitudinal striae; aperture terminal, rounded, with a simple to bifid tooth that may attach at the sides to result in a multiple aperture. Holocene; Gulf of California. (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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