'Middle' Cretaceous morphological diversity within the genus Ceratolithina Martini, 1967.
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[1] K. Perch-Nielsen. New Lower Cretaceous calcareous nannofossil species from England. , 1988, Journal of Nannoplankton Research.
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[1] K. Perch-Nielsen. New Lower Cretaceous calcareous nannofossil species from England. , 1988, Journal of Nannoplankton Research.