Morphologic reinterpretation of some Dinogymnium species with remarks on palaeogeographic and stratigraphic distribution of the genus

K.P. Jain

doi:10.54991/jop.1975.979

Authors

K.P. Jain Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow 226007, India

DOI:

https://doi.org/10.54991/jop.1975.979

Abstract

The Upper Cretaceous dinoflagellate genus Dinogymnium Evitt et al. (1967) possesses 32 species. Of these, D. curvatum (Vozzhennikova) Lentin & Williams, D. kasachstanicum (Vozzhennikova) Lentin & Williams, D. sibiricum (Vozzhennikova) Lentin & Williams and D. sphaerocephalum (Vozzhenni- kova) Lentin & Williams have been reinterpreted following the generic conception of the genus proposed by Evitt et al. (1967). The palaeogeographic and stratigraphic distribution of Dinogymnium species has been tabulated. It has been concluded that the genus Dinogymnium is cosmopolitan, occurred mostly along 45°N and 45°S latitudes. It flourished best during Campanian-Maestrichtian time though made a humble beginning in Albian-Cenomanian.

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