Foraminifera taxon details
From editor or global species database
Diagnosis Test planispiral, robust, bilaterally symmetrical throughout, involute and biumbonate, few chambers per whorl, increasing rapidly in height as added so that test is somewhat oval in outline, sutures radial and nearly straight, periphery rounded; wall calcareous, vitreous, optically granular, thin, very finely and sparsely perforate, slightly larger pores in the apertural face, surface of umbilical area covered by small granules; aperture interiomarginal, equatorial, largely obscured by granules, leaving open only small pores. Upper Cretaceous (Maastrichtian) to Paleocene; USSR: Ukraine, Baltic region, W. Siberia; E. Germany. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
From editor or global species database
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