Diagnosis
provided by World Register of Marine Species
Test up to 1 mm in diameter, early stage trochospiral, spiral side flattened, later chambers in approximately cyclic series, those of successive cycles alternating in position, chambers inflated, of somewhat irregular form, sutures depressed, deeply umbilicate on the convex umbilical side, periphery broadly rounded, peripheral outline lobulate; wall calcareous, optically radial, coarsely perforate, an organic layer giving a brownish color to chambers of the early whorl; aperture consists of rows of large pores along each suture on the umbilical side. Holocene; Indian Ocean: Madagascar; W. Pacific; Samoa; Philippines; Ki Islands; Fiji. (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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