Foraminifera taxon details
From editor or global species database
Diagnosis Low planoconvex test of ovate outline, two chambers per whorl, all of the five pairs of low chambers visible on the convex spiral side, increasing rapidly in breadth as added, only the final pair visible on the flattened umbilical side where chambers appear hemispherical and somewhat inflated, sutures flush, periphery broadly rounded; wall calcareous, hyaline, and transparent, finely perforate, smooth; aperture a slit extending a short distance up the final chamber face from the umbilical margin, that of the penultimate chamber closed by secondary shell deposition. Holocene; S. Pacific: Galapagos Islands. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
From editor or global species database
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