Diagnosis
provided by World Register of Marine Species
Test biserial or triserial, at least in early stage, may be reduced to uniserial but more commonly shows chamber proliferation in the later stage; aperture a low to high arch at the base of the final chamber or terminal in the uniserial stage. L. Cretaceous (Aptian) to Holocene. (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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