Diagnosis
provided by World Register of Marine Species
Test fusiform to palmate in outline, compressed, periphery rounded, large ovate proloculus followed by elongate low chambers in biserial arrangement, each extending proximally at the test margin, sutures strongly oblique, depressed; wall calcareous, hyaline radiate, with a distinctly transparent collar at the aperture, those of previous chambers remaining visible along the test midline, surface smooth, except for a sharp longitudinal rib extending obliquely from the midline of the flat test face across each chamber toward its proximal end; aperture terminal, radiate, produced on the hyaline neck. Holocene; E. Pacific, off Mexico. (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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