Diagnosis
provided by World Register of Marine Species
Test elongate, ovate in section, uniserial and rectilinear, chambers increasing in height as added from the globular proloculus, sutures arched across the broad faces of the test, margins rounded; wall calcareous, hyaline, finely perforate, surface smooth; aperture terminal, rounded, surrounded by a ring of low rounded knobs. Pleistocene to Holocene, tropical N. Pacific, western S. 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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