Foraminifera taxon details
From editor or global species database
Diagnosis Test triserial in early stage, later may be biserial and finally uniserial, rarely uniserial throughout but with triserial ancestry reflected internally by the hemicylindrical toothplates that change orientation by 120¡ in successive chambers, as in the uniserial stage of those with triserial base; aperture terminal, rounded, with short neck or thickened rim. U. Cretaceous (Turonian) to Holocene. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
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