Diagnosis
provided by World Register of Marine Species
Test elongate, high spired, with nearly parallel sides, conical proloculus followed by trochospirally enrolled chambers, each a full whorl in length but with distal margin overlapping the proximal one, and not rectilinear, sutures oblique, flush to slightly depressed, visible from the side toward which the aperture is directed; wall calcareous, coarsely perforate, outer wall surface with tiny pustules except for the clear, smooth, and polished apertural face; aperture a recurved slit extending toward the center of the distal end, at the termination of the final chamber, somewhat resembling the S-shaped opening of the Patellinidae. Holocene; Pacific. (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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