Diagnosis
provided by World Register of Marine Species
Test elongate, slightly compressed, early chambers biserially arranged and strongly overlapping at the test margins as in Polymorphina, final chamber globular, centered or slightly eccentric, produced terminally into a short neck, sutures strongly oblique and depressed in the early stage, final one nearly straight and horizontal, strongly constricted; wall calcareous, hyaline, finely perforate, surface smooth; aperture rounded, terminal on the short cylindrical neck. Holocene; E. Pacific; Gulf of California, Mexico. (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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