Diagnosis
provided by World Register of Marine Species
Test elongate, flattened, palmate in outline, biserial, chambers broad and low and sutures strongly oblique on the dorsal side, chambers more strongly overlapping and sutures less oblique on the ventral side where the final pair of chambers comprises about one-half the test, proximal margin of chambers truncated, with a sharp and commonly fimbriate border and with lateral spinelike projections resulting in a serrate margin, sutures depressed; wall calcareous, finely perforate, glossy, surface smooth except for the fimbriate or serrate lower chamber margin; aperture an elongate slit paralleling the margin on the ventral side, extending from the base of the chamber nearly to the test apex. Holocene; Pacific: off Bikini Island, at about 1,700 m to 2,300 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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