Distinguishing features: Large podorhabdid with central area spanned by eight bars that delineate eight large perforations that run either side of the longitudinal axis. Central hollow spine.
Taxonomy:
Farinacci & Howe catalog pages: Octocyclus magnus *
Distinguishing features: Large podorhabdid with central area spanned by eight bars that delineate eight large perforations that run either side of the longitudinal axis. Central hollow spine.
Geological Range:
Last occurrence (top): within Maastrichtian Stage (66.04-72.05Ma, top in Maastrichtian stage). Data source: Bown et al. 1998
First occurrence (base): within Albian Stage (100.50-112.95Ma, base in Albian stage). Data source: Bown et al. 1998
Plot of occurrence data:
Black, M. (1972). British Lower Cretaceous Coccoliths. I-Gault Clay (Part 1). Palaeontographical Society Monograph. 126: 1-48. gs Bown, P. R., Rutledge, D. C., Crux, J. A. & Gallagher, L. T. (1998). Early Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 86-131. gs Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 132-199. gs Varol, O. & Girgis, M. (1994). New taxa and taxonomy of some Jurassic to Cretaceous calcareous nannofossils. Neues Jahrbuch für Geologie und Paläontologie Abhandlungen. 192: 221-253. gsReferences:
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Octocyclus magnus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 15-12-2019
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