Biscutum dorsetensis


Classification: Mesozoic -> Podorhabdales -> Biscutaceae -> Biscutum -> Biscutum dorsetensis
Sister taxa: B. arrogans, B. asymmetricum, B. boletum, B. constans, B. coronum, B. davyi, B. dekaenelii, B. depravatus, B. dissimilis, B. dorsetensis, B. dubium, B. ellipticum, B. erismatum, B. gaultensis, B. grande, B. hattneri, B. intermedium, B. magnum, B. melaniae, B. notaculum, B. planum, B. profundum, B. thurowii, B. virginica, B. zulloii, B. sp.,

Distinguishing features: Circular to subcircular bicyclic Biscutum with a narrow central area and tall spine. Bicyclic image in XPL.


Taxonomy:

Citation: Biscutum dorsetensis (Varol & Girgis, 1994) Bown in Bown & Cooper, 1998
Rank: Species
Basionym: Palaeopontosphaera dorsetensis Varol & Girgis, 1994

Farinacci & Howe catalog pages: Palaeopontosphaera dorsetensis *

Distinguishing features: Circular to subcircular bicyclic Biscutum with a narrow central area and tall spine. Bicyclic image in XPL.

Geological Range:
Notes: May range as high as lower Valanginian in the Pacific ocean (Subzone NK3a) (Bown, 2005).
Last occurrence (top): within Tithonian Stage (145.01-152.06Ma, top in Tithonian stage). Data source: Bown & Cooper 1998
First occurrence (base): within Late Bathonian Substage (166.07-166.49Ma, base in Bathonian 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: Biscutum dorsetensis, synonyms included - Biscutum dorsetensis; Palaeopontosphaera dorsetensis;
  • space-time plot :: Samples map :: Parent: Biscutum

    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

    Bown, P. R. (2005c). Early to Mid-Cretaceous Calcareous Nannoplankton from the Northwest Pacific Ocean, Leg 198, Shatsky Rise. Proceedings of the Ocean Drilling Program. Scientific Results. 198: 1-82. 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


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    Biscutum dorsetensis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 13-12-2019

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10077 Go to Archive.is to create a permanent copy of this page - citation notes



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