Foraminifera taxon details
From editor or global species database
Diagnosis Test enrolled, planispiral, and involute, commonly three rapidly enlarging chambers per whorl, triangular septal chamberlets formed by septa} lamellae or partitions as in Bradyina; wall calcareous, granular, with outer tectum and inner part alveolar to keriothecal and perforate; aperture basal in the early stage, later areal and multiple with a few horizontal slits, and finally consisting of elongate slits up the apertural face as well as horizontal slits at the position of the internal septal lamellae or partitions, sutural openings as in Bradyina but much larger vertical slits perpendicular to the septa. U. Carboniferous (Westphalian to Stephanian) to Permian; USA: Oklahoma, Colorado, Texas; USSR: Russian Platform, Urals, central Asia; Egypt. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
From editor or global species database
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