Perissocyclus plethotretus


Classification: Mesozoic -> Podorhabdales -> Axopodorhabdaceae -> Perissocyclus -> Perissocyclus plethotretus
Sister taxa: P. fenestratus, P. liesbergensis, P. noeliae, P. plethotretus, P. tayloriae, P. sp.,

Distinguishing features: Large (>7µm) podorhabdids with a central area grill that has an outer cycle of 12 (occasionally 10 to 14) large perforations separated by clearly birefringent struts. An additional inner cycle of perforations may be present, but these are not normally visible in the LM. The bars adjoining the central spine may be thickened to form buttresses.


Taxonomy:

Citation: Perissocyclus plethotretus (Wind & Cepek, 1979) Crux, 1989
Rank: Species
Basionym: Octopodorhabdus plethotretus Wind & Cepek, 1979
Synonyms: Duplexipodorhabdus plethotretus  (Wind & Cepek, 1979) Varol & Girgis 1994
Octopodorhabdus polytretus Wind & Cepek, 1979 (nomen nudum)
Notes & discussion: Wind & Cepek 1979 usd the name O. plethotretus in the text but O. polytretus on their figure caption. The text spelling is the intended and valid one.

Farinacci & Howe catalog pages: Octopodorhabdus plethotretus *

Distinguishing features: Large (>7µm) podorhabdids with a central area grill that has an outer cycle of 12 (occasionally 10 to 14) large perforations separated by clearly birefringent struts. An additional inner cycle of perforations may be present, but these are not normally visible in the LM. The bars adjoining the central spine may be thickened to form buttresses.

Geological Range:
Last occurrence (top): within Barremian Stage (126.30-130.77Ma, top in Barremian stage). Data source: Bown et al. 1998
First occurrence (base): at base of BC8c subzone (0% up, 133.1Ma, in Hauterivian stage). Data source: Bown et al. 1998 - zonal marker

Plot of occurrence data:

  • Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
  • Note to users in China - the diagram may not plot unless you use a VPN since I use google services on the website. If this is a problem please contact me 谢谢.
  • Taxon plotted: Perissocyclus plethotretus, synonyms included - Duplexipodorhabdus plethotretus; Octopodorhabdus plethotretus; Perissocyclus plethotretus;
  • space-time plot :: Samples map :: Parent: Perissocyclus

    References:

    Applegate, J. L. & Bergen, J. A. (1988). Cretaceous calcareous nannofossil biostratigraphy of sediments recovered from the Galicia Margin, ODP Leg 103. Proceedings of the Ocean Drilling Program. Scientific Results. 103: 293-348. 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

    Covington, J. M. & Wise, S. W. (1987). Calcareous nannofossil biostratigraphy of a Lower Cretaceous deep-sea fan complex: Deep Sea Drilling Project Leg 93 Site 603, lower continental rise off Cape Hatteras. Initial Reports of the Deep Sea Drilling Project. 93: 617-660. gs

    Crux, J. A. (1989). Biostratigraphy and palaeogeographical applications of Lower Cretaceous nannofossils from north-western Europe. In, Crux, J. A. & Heck, S. E. v. (eds) Nannofossils and their applications. British Micropalaeontological Society Publication Series. 143-211. gs

    de Kaenel, E. & Bergen, J. A. (1996). Mesozoic calcareous nannofossil biostratigraphy from sites 897, 899, and 901, Iberia Abyssal Plain: New biostratigraphic evidence. Proceedings of the Ocean Drilling Program. Scientific Results. 149: 27-59. 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. gs

    Wind, F. H. & Cepek, P. (1979). Lower Cretaceous calcareous nannoplankton from DSDP Hole 397A (northwest African Margin). Initial Reports of the Deep Sea Drilling Project. 47A: 221-235. gs


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    Perissocyclus plethotretus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 12-11-2019

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10886 Go to Archive.is to create a permanent copy of this page - citation notes



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