Diagnosis
provided by World Register of Marine Species
Test subfusiform, circular in section, chambers enlarging rapidly as added, strongly overlapping, early chambers added in five planes, later biserial, sutures oblique, flush to slightly depressed; wall calcareous, thin, hyaline, surface smooth, with clear and transparent collar just beneath the region of the aperture; aperture terminal, radiate, with a slightly eccentric and curved narrow entosolenian tube. Holocene; W. Pacific: off Korea, at about 45 m. (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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