Diagnosis
provided by World Register of Marine Species
Test free, compressed, ovate in outline, planispirally enrolled and evolute, with a tendency to uncoil, later chambers extending back toward the proloculus at the inner margin, microspheric proloculus completely surrounded by enrolled chambers, whereas the megalospheric proloculus is not overlapped by the last. chambers of the early coiled portion; wall coarsely agglutinated on an organic lining that also covers the septa, imperforate, and lacking calcareous cement; aperture simple, rounded, terminal, at the dorsal angle of the final chamber, may be temporarily sealed by a plug of debris. L. Cretaceous (Neocomian) to Holocene; Atlantic; Pacific; North America; Europe; Africa. (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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