Diagnosis
provided by World Register of Marine Species
Test small, up to 0.23 mm in diameter, in a very low trochospiral coil of two to three whorls, chambers enlarging rapidly as added, sutures curved on the convex spiral side, nearly radial on the concave umbilical side, with a single deep invagination about midway between the umbilicus and periphery producing a lobe at either side; wall agglutinated, single layered, imperforate, well cemented; aperture single, interiomarginal, beneath the umbilical lobe of the final chamber, those of earlier chambers remaining open into the umbilicus. Holocene; Brazil: Sepetiba Bay. (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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