Diagnosis
provided by World Register of Marine Species
Test unilocular, elongate, fusiform, tapering slowly at the base; wall calcareous, hyaline, surface smooth and unornamented; aperture rounded at the end of the long tapering neck, bordered by a smooth everted lip. M. Oligocene (Rupelian) 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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