Diagnosis
provided by World Register of Marine Species
Test trochospiral, periphery rounded to carinate; wall finely lamellar, perforate, of optically radial calcite, with inner organic lining and a primary organic membrane calcified on both sides to produce a primary bilamellar structure, but with thicker outer calcite layers; surface smooth, nonspinose, but may be pustulose or pitted, inflational pustules most prominent in the apertural region, pits when present are bordered by ridges and have one or more large pores at the center; primary aperture interiomarginal and extraumbilical-umbilical, may be bordered by an imperforate lip; supplementary sutural apertures and bullae may occur, accompanied by infralaminal accessory apertures. L. Paleocene (L. Danian) to Holocene. (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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