Diagnosis
(
anglais
)
fourni par World Register of Marine Species
Test in low trochospiral coil, spiral side convex with a few inflated chambers around a clear central boss that covers earlier chambers, umbilical side flat to slightly concave, six chambers of the final whorl visible around the open umbilicus, sutures straight, radial, depressed on the spiral side, peripheral margin of umbilical side carinate, periphery of spiral side broadly truncate and sloping slightly toward the central boss, peripheral outline lobulate; wall calcareous, translucent, finely perforate except for more coarsely perforate and granulose oval area near the inner margin of each chamber on the spiral side, umbilical side with numerous rows of granules radiating from the umbilicus; aperture umbilical. Holocene, at 20 m to 60 m; USA: Santa Barbara Island, California; Philippines. (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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