Diagnosis
provided by World Register of Marine Species
Test free, elongate, early stage in high trochospiral coil of up to five chambers per whorl, number of chambers per whorl later reduced and finally uniserial, chambers subdivided internally by up to fourteen vertical radial exoskeletal beams; wall thick, agglutinated, canaliculate; aperture interiomarginal in the early stage, later terminal, and rounded, radiate, or multiple, consisting of a few slitlike openings. Eocene to Holocene; cosmopolitan. (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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