Diagnosis
provided by World Register of Marine Species
Test free, large, uniserial, and rectilinear to slightly arcuate; ovate to fusiform chambers separated by very elongate, delicate, and stolonlike necks, hence commonly broken, although a three-chambered test may attain a length of 5 mm; wall agglutinated, very thin, of a single layer of well-cemented grains; aperture terminal on the elongate neck, rounded. U. Eocene; USSR. Holocene; N. Pacific at 4,100 m to 5,550 m; S. Pacific at 2,140 m to 4,320 m; N. Atlantic at 710 m to 3,500 m; S. Atlantic at 1,800 m; Antarctic from 3,140 m to 5,200 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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