Diagnosis
provided by World Register of Marine Species
Test tiny, elongate, flattened ovate in section, biserial throughout but with tendency for final chamber to become terminal, chambers increasing in relative height as added, sutures oblique, depressed; wall calcareous, hyaline, no perforations evident at X 7000 magnification, surface smooth; aperture looplike at the base of the final chamber face, on a short neck and bordered above with a narrow lip, may become subterminal and free of the base but completely surrounded by the recurved lip. U. Miocene to Holocene; Malay Archipelago; Sahul Shelf off Northwest Australia; Pacific: Tonga Island; USA: E. coast; Trinidad; Venezuela; Greece: Delos Island. (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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