Diagnosis
provided by World Register of Marine Species
Test short and stout, early stage of up to five chambers per whorl, rapidly becoming triserial, then with a reduced biserial stage and short uniserial stage, circular in section; wall coarsely agglutinated, canaliculate, with thin dense inner layer, finely agglutinated thick and dense median layer, and an outer coating of coarse grains; aperture a vertical straight to curved slit in the juvenile, later nearly terminal and central, varying from a curved slit to subradiate or cribrate. M. Eocene to M. Miocene; New Zealand; Andaman Sea: Car Nicobar. (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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