Diagnosis
provided by World Register of Marine Species
Test subglobular, early stage with chambers one-half coil in length and pseudotriloculine in arrangement, later biloculine with successive chambers strongly overlapping the preceding ones; wall calcareous, imperforate, porcelaneous; aperture in the early stage with a large triangular tooth, in the adult the tooth is attached at both ends, dividing the V-shaped opening into two separate elongate openings, additional straight, sinuate, or V-shaped openings may also occur. Pleistocene to Holocene; S. Atlantic; Gulf of Mexico; USA: 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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