Diagnosis
provided by World Register of Marine Species
Test rounded in outline, flattened, early stage with chambers a half coil in length in quinqueloculine arrangement, later with broad and strongly overlapping planispiral chambers that are narrower at the base and widen distally, final whorl may include two and a half chambers as last one is slightly shorter, sutures depressed, periphery rounded; wall calcareous, porcelaneous, thick, surface with longitudinal to oblique ribs; aperture a high arch at the end of the final chamber, with a narrow triangular tooth projecting from its base. Holocene, at 20 m to 40 m; 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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