Abstract

"The Oligocene form of Cassigerinella chipolensis (Cushman and Ponton) does not differ from C. boudecensis Pokorny, and the Aquitanian form from the Cipero formation in Trinidad is only slightly different. The inner structure reveals a distinct well-developed toothplate in all chambers, resembling that found in Cassidulina. The type species of Cassigerinella belongs to the group of cassiduline species which Noervang gathered into his genus Islandiella, a name that thus becomes a junior synonym of Cassigerinella Pokorny. Cassigerinella has to be removed from the Globigerinidae, which are deuteroforaminate in origin, and placed in the Cassidulinidae, order Protoforaminata."

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