Diagnosis
provided by World Register of Marine Species
Test discoidal, globular to ovate proloculus followed by planispirally enrolled undivided tubular second chamber that is loosely coiled and separated from the previous whorl by a narrow solid platelike area, periphery carinate, the keel appearing fimbriate or bearing numerous relatively long solid spines; wall hyaline, appearing optically as a single crystal except for the plate separating the whorls, numerous prominent perforations on one side, and opposite side imperforate but with secondarily added granulations; aperture a simple rounded opening at the end of the tubular chamber. Holocene; Atlantic. (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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