Foraminifera taxon details
From editor or global species database
Diagnosis Test a low to high trochospiral, later stage with reduced number of chambers per whorl, and finally may become uniserial; aperture a low interiomarginal umbilical slit in trochospiral taxa, becoming terminal and central in the uniserial stage; a prominent hemicylindrical toothplate projecting inward from the aperture as a columellalike structure that even in the uniserial stage changes in orientation from chamber to chamber, reflecting the ancestral coiled state. L. Cretaceous (U. Aptian) to U. Cretaceous (Maastrichtian). (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
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