Odébòdé, M. O. (1982). Senonian Heterohelicidae from the Calabar Flank, southeastern Nigeria. Revista Española de Micropaleontología. 14: 231-246.

284544

Odébòdé, M. O.

1982

14: 231-246

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Planktonic foraminifera are described for the first time from the Senonian sediments on the Calabar Flank, southeastern Nigeria. The species described belong to the family Heterohelicidae Cushman and they were all recovered from the Nkporo Shale. Three of them, Heterohelix calabarflanki n. sp., Heterohelix ivandeklaszi n. sp., and Heterohelix nkporoensis n. sp. are new. The Nkporo Shale sediments on the flank have hitherto been considered Senonian in age solely on the basis of the formation's stratigraphic position. The Heterohelicid foraminiferal assemblage provides the first conclusive evidence for this age indicating a Santonian-Campanian age for the lower part of the formation.

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