Diagnosis
provided by World Register of Marine Species
Test trochospiral, attached by the flattened to concave and evolute spiral side, umbilical side convex and involute, the chambers having an umbilical flap or folium, sutures curved, limbate, and flush on the spiral side, strongly curved and depressed on the umbilical side, sutural depression greatest toward the umbilicus and may form a slitlike to tubular intercameral opening that completely penetrates the test and opens on the spiral side between the apertural lip and periphery but is not continuous with the aperture, periphery angular, carinate, peripheral outline lobulate to irregular; wall calcareous, optically radial, coarsely perforate on the umbilical side, imperforate to sparsely perforate on the spiral side, with imperforate apertural lip, border of intercameral openings, umbilical projections, and keel; primary aperture interiomarginal and equatorial as in Cibicides and continuing along the spiral suture, bordered by a protruding lip, secondary apertures on the umbilical side open beneath the series of triangular umbilical flaps or folia. L. Pliocene to Holocene; USA: California; Mexico; Ecuador; Pacific: Galapagos Islands. (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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