Present Inaccurate Introduced: alien Containing type locality
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Diagnosis Test ovate to auriculate in outline, planoconvex, low trochospiral coil with one or two rapidly widening whorls, chambers crescentic on the gently convex spiral side, subtriangular on the flat to centrally concave umbilical side, sutures curved, thickened and flush on the spiral side, radial and depressed on the umbilical side, periphery carinate; wall calcareous, optically radial, finely perforate, surface smooth on the spiral side, radially grooved on the umbilical side; aperture a low to high interiomarginal and umbilical arch, may have an umbilical lobe just posterior to the opening on the final chamber, aperture secondarily closed by an umbilical plate as new chambers are added, apertures of earlier chambers not overlapped by the succeeding chambers but closed by the later formed plates that remain visible around the umbilicus. Eocene to Holocene; cosmopolitan. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
From editor or global species database