Diagnosis
provided by World Register of Marine Species
Test triserial and triangular, at least in the early stage, later may be reduced to biserial or uniserial; wall agglutinated, noncanaliculate; aperture areal, bordered by a distinct lip, and may be elevated on a neck. U. Cretaceous o 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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