Diagnosis
provided by World Register of Marine Species
Test elongate, ovate in form, rounded in section, chambers in a high trochospiral coil of three strongly overlapping chambers per whorl, increasing rapidly in height as added, final whorl occupying most of the test length, sutures depressed, strongly oblique; wall calcareous, optically granular, finely perforate, surface smooth; aperture consists of fine pores in an arched spongy area at the base of the apertural face, large secondary sutural openings lead into subsutural canals that terminate in this spongy area. Holocene; Mediterranean; Antarctic; 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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