Diagnosis
provided by World Register of Marine Species
Test broad and flattened, up to 1.0 mm in length, periphery carinate, proloculus followed by about two whorls of chambers one-half coil in length, in sigmoiline arrangement, later chambers increase rapidly in breadth but not proportionately in length so that later whorls have three chambers per whorl and coiling becomes planispiral, final stage with up to two uncoiled chambers; wall calcareous, porcelaneous, surface smooth and shining or may be faintly striate; aperture at the open end of the final chamber, an elongate slit bordered by an everted lip. Holocene; Gulf of Mexico: off Florida; West Indies. (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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