Diagnosis
provided by World Register of Marine Species
Test elongate, subfusiform, chambers onehalf coil in length, added in a sigmoiline series, lateral extensions of the chamber wall strongly overlapping all earlier chambers but the penultimate one and only two chambers visible from the exterior, chambers with complete floors, not closely appressed and in section may show gaps between chambers; wall calcareous, imperforate, porcelaneous, surface may have longitudinal costae; aperture small, rounded, without a tooth, at the end of a protruding neck that may have a phialine lip. Holocene; China: Xisha Islands. (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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