Diagnosis
provided by World Register of Marine Species
Test biserial throughout, diamond shaped in section, with angular lateral margins and medially inflated broad surfaces, chambers increasing rapidly in size as added, producing a flaring test, the final pair of chambers comprising nearly half the test length; wall finely agglutinated; aperture a small, slightly produced ovate opening just above the base of the apertural face. Miocene; Okinawa, Ryukyu Islands; New Zealand. (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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