Diagnosis
(
الإنجليزية
)
المقدمة من World Register of Marine Species
Test globose, three to five inflated chambers per whorl in a high trochospiral coil, sutures radial, depressed; wall calcareous, hyaline, radial, microperforate, the extremely fine pores irregularly distributed, surface smooth but at high magnification may appear finely pustulose or pebbly; primary aperture in the early stage a low interiomarginal umbilical slit, later chambers with tiny rounded secondary sutural openings bordered by raised narrow rims at each side of the primary aperture and completely replacing the primary aperture in the adult, sutural openings surround the chambers of the last few whorls on both spiral and umbilical sides of the test. Miocene to Holocene; cosmopolitan. (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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