Diagnosis
provided by World Register of Marine Species
Test predominantly dextrally coiled in a high trochospiral, chambers somewhat inflated, internally subdivided by a transverse partition produced by infolding of the outer wall, the proximal chamberlet covering the previous aperture and opening into the preceding main chamber and not into that of the same instar, sutures oblique, depressed; wall aragonitic, hyaline, very finely perforate, surface smooth; aperture consisting of two slitlike openings, one interiomarginal at the proximal margin of the chamber, the other diverging from the chamber margin and directed up the apertural face, small supplementary triangular opening also present on the opposite side of the test at the junction of the internal partition and previous septum. L. Eocene to Holocene. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification)
Loeblich, A. R.; Tappan, H. (1987). Foraminiferal Genera and their Classification. Van Nostrand Reinhold Company, New York. 970pp.
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