Diagnosis
provided by World Register of Marine Species
Test elongate ovate, rounded in section, triserial, chambers somewhat inflated and strongly overlapping, sutures strongly oblique to nearly vertical, depressed; wall calcareous, optically radial, perforate, surface smooth, or may have tiny spines at the base of the chambers; aperture a high narrow curved slit, extending from the base of the final chamber, toothplate consists of a simple folded tongue that connects the aperture and preceding foramen, with fixed shank attached to the chamber wall below the aperture and wide free shank that may be dentate joined to the wall at the anterior end of the aperture, a small free tip protruding through the opening. U. Paleocene (Thanetian) to Holocene; cosmopolitan. (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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