Diagnosis
provided by World Register of Marine Species
Test unilocular, ovate, compressed, the dorsal side terminally produced and spreading in a hoodlike structure over the aperture; wall calcareous, hyaline, periphery with a single or double, smooth or chainlike keel or may have a double keel in part of the test and a single one elsewhere; aperture broad and crescentic, subterminal between the asymmetrically developed lips, the dorsal border produced and the ventral one shorter, entosolenian tube fastened to the midline of the dorsal wall in the upper part, then turns to one edge and continues into the lower half of the test. Pleistocene? to Holocene; Mediterranean; Southwest Pacific. (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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