Foraminifera taxon details
From editor or global species database
Diagnosis Test elongate, somewhat compressed, enlarging gradually, chambers biserially arranged but may be twisted about the axis up to about 90¡, periphery subacute to carinate, sutures arched, depressed; wall calcareous, finely perforate, surface with prominent transverse and arched ribs paralleling the sutures just above the lower edge of the chambers, may fuse laterally into the marginal carinae; aperture terminal, rounded to ovate, with a short neck and lip, no toothplate. U. Cretaceous (Campanian to Maastrichtian); USA: Texas, Mississippi. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
From editor or global species database
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