Diagnosis
provided by World Register of Marine Species
Test elongate, compressed, with a few rectilinear, rapidly enlarging and very strongly embracing chambers with a carinate lower border, septa resorbed with growth, external sutures nearly straight and horizontal, constricted; wall calcareous, translucent, finely perforate, surface smooth, except for the carinate lower margin of the chambers just above the sutures, and an apiculate projection at the lateral margins; aperture terminal, slitlike to ovate, with an entosolenian tube that is directed downward then bends at right angles toward the wall at one margin and bends again to parallel the outer wall nearly to the base of the chamber. Holocene; Pacific: Bikini Atoll; Galapagos Islands; Gulf of California; USA: off 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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