Distinguishing features: Elliptical; central area spanned by eight bars delineating eight large perforations arranged either side of the long axis.
Daughter taxa (time control age-window is: 0-800Ma)![]() | ||||
![]() | Octocyclus magnus 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. | |||
Octocyclus reinhardtii Podorhabdid with central area spanned by eight bars that delineate eight large perforations that run either side of the longitudinal axis. | ||||
Octocyclus sp. Specimens not identified to species level |
Taxonomy:
Farinacci & Howe catalog pages: Octocyclus *
Distinguishing features: Elliptical; central area spanned by eight bars delineating eight large perforations arranged either side of the long axis.
Search data:Tags | LITHS: placolith, ca_disjunct, grill, pores, process, CROSS-POLARS: rim-bicyclic, V-prominent, |
Metrics | Lith size: 8->15µm; Data source notes: size range of included species |
Geological Range:
Last occurrence (top): at top of Maastrichtian Stage (100% up, 66Ma, in Maastrichtian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Albian Stage (0% up, 113Ma, in Albian stage). Data source: Total of range of species in this database
Plot of occurrence data:
Black, M. (1972a). 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. gsReferences:
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Octocyclus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 18-4-2021
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10808 Go to Archive.is to create a permanent copy of this page - citation notes |