Octopodorhabdus decussatus


Classification: Mesozoic -> Podorhabdales -> Axopodorhabdaceae -> Octopodorhabdus -> Octopodorhabdus decussatus
Sister taxa: O. decussatus, O. praevisus, O. sp.,

Distinguishing features: Podorhabdids with central area spanned by eight bars that delineate eight large perforations that run either side of the longitudinal axis.


Taxonomy:

Citation: Octopodorhabdus decussatus (Manivit, 1959) Rood et al., 1971
Rank: Species
Basionym: Discolithus decussatus Manivit, 1959
Notes & discussion: Holotype is a sketch from the lower Eocene that looks little like this Jurassic podorhabdid, but the name has been adopted presumably on the assumption the specimen might be reworked.

Farinacci & Howe catalog pages: Discolithus decussatus *

Distinguishing features: Podorhabdids with central area spanned by eight bars that delineate eight large perforations that run either side of the longitudinal axis.

Search data:
TagsLITHS: placolith, elliptical, CA: cross-axial, grill, pores, process, V-UNITS: V-prominent, DETAILS: ca_disjunct, rim-bicyclic,
MetricsLith size: 5->8µm;
Sources: illustrated specimens
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NJ14 zone (160.84-163.64Ma, top in Oxfordian stage). Data source: Bown & Cooper 1998
First occurrence (base): within NJ11 zone (166.40-168.67Ma, base in Bajocian stage). Data source: Bown & Cooper 1998

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: Octopodorhabdus decussatus, synonyms included - Octopodorhabdulus decussatus; Octopodorhabdus decussatus;
  • space-time plot :: Samples map :: Parent: Octopodorhabdus

    References:

    Bown, P. R. & Cooper, M. K. E. (1998). Jurassic. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 34-85. gs :: ::

    Grün, W. & Zweili, F. (1980). Das kalkige Nannoplankton der Dogger-Malm-Grenze im Berner Jura bei Liesberg (Schweiz). Jahrbuch der Geologischen Bundesanstalt. 123: 231-341. gs :: ::

    Manivit, H. (1959). Contribution a l'étude des coccolithes del'Eocene. Publications du Service de la Carte Géologique de l'Algérie (Nouvelle Série) Bulletin. 25: 333-382. gs :: ::

    Medd, A. W. (1979). The Upper Jurassic coccoliths from the Haddenham and Gamlingay boreholes (Cambridgeshire, England). Eclogae Geologicae Helvetiae. 72: 19-109. gs :: view :: open

    Rood, A. P., Hay, W. W. & Barnard, T. (1971). Electron Microscope Studies of Oxford Clay Coccoliths. Eclogae Geologicae Helvetiae. 64: 245-272. gs :: view :: open

    Rood, A. P., Hay, W. W. & Barnard, T. (1973). Electron microscope studies of Lower and Middle Jurassic coccoliths. Eclogae Geologicae Helvetiae. 66: 365-382. gs :: view :: open


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    Octopodorhabdus decussatus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 4-6-2020

    Taxon Search:
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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10816 Go to Archive.is to create a permanent copy of this page - citation notes



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