Foraminifera taxon details
From editor or global species database
Diagnosis Test trochospiral, biconvex, few chambers per whorl, increasing rapidly in size, final ones somewhat inflated, sutures curved, thickened and elevated on the spiral side, straight and flush to slightly depressed on the umbilical side, periphery carinate; wall calcareous, calcitic, as determined by X-ray powder diffraction film, perforate, surface smooth other than the limbate and elevated sutures, with broad spiralling bands of clear translucent shell material adjacent to the peripheral keel; aperture a low interiomarginal slit at the base of the apertural face, continuing past the umbilicus as a sutural slit at the proximal chamber margin, and large areal pores scattered over the apertural face. Eocene; Europe. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
From editor or global species database
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