Distinguishing features: Biscutacean placolith with bicyclic rim and narrow central-area spanned by an oblique transverse bar.
Taxonomy:
Farinacci & Howe catalog pages: Gephyrobiscutum diabolum *
Distinguishing features: Biscutacean placolith with bicyclic rim and narrow central-area spanned by an oblique transverse bar.
Morphology remarks: Austral biogeographic distribution, but rarely reported.
Geological Range:
Last occurrence (top): within Campanian Stage (72.05-83.64Ma, top in Campanian stage). Data source: Burnett 1998
First occurrence (base): within Campanian Stage (72.05-83.64Ma, base in Campanian stage). Data source: Burnett 1998
Plot of occurrence data:
Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 132-199. gs Wise, S. W. (1988). Mesozoic-Cenozoic history of calcareous nannofossils in the region of the Southern Ocean. Palaeogeography Palaeoclimatology Palaeoecology. 67: 157-179. gsReferences:
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Gephyrobiscutum diabolum compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 7-12-2019
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