Diagnosis
(
anglais
)
fourni par World Register of Marine Species
Test slightly asymmetrical and weakly trochospiral, with evolute spiral side and nearly involute and deeply umbilicate opposite side, chambers of nearly constant height but increasing rapidly in breadth to result in an auriculate test outline, sutures slightly depressed, particularly in the umbilical region, gently curved, sides flattened, periphery rounded; wall calcareous, perforate, hyaline, optically granular, transparent, surface smooth, but with pustules or small spinules bordering the umbilical rim of the chambers, in the vicinity of the aperture; aperture a low interiomarginal and equatorial arch. Holocene; sublittoral region, Atlantic, Caribbean, Pacific. (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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