Diagnosis
provided by World Register of Marine Species
Test attached, early chambers coiled, later with irregularly arranged inflated chambers encrusting the substrate; wall calcareous, coarsely perforate; aperture consisting only of the coarse perforations. Miocene to Holocene; Europe; North America; Pacific; Indian Ocean. (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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