Biscutum gaultensis


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

Distinguishing features: Small (4-5 µm), with well-developed central area with birefringent axial structure.


Taxonomy:

Citation: Biscutum gaultensis (Mutterlose, 1992) Bown in Kennedy et al., 2000
Rank: Species
Basionym: Seribiscutum gaultensis Mutterlose, 1992

Farinacci & Howe catalog pages: Seribiscutum gaultensis *

Distinguishing features: Small (4-5 µm), with well-developed central area with birefringent axial structure.


Morphology remarks: From the original description - "The central area is nearly filled by at least four platelike elements that are interrupted in the center by a pore. The central elements are discernible under the light microscope and form a distinctive extinction pattern"

Search data:
TagsLITHS: placolith, elliptical, CA: closed, V-UNITS: V-prominent, R-UNITS: R-prominent, DETAILS: ca_disjunct, rim-bicyclic,
MetricsLith size: 4->5µm;
Sources: original description
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): in mid part of UC5a subzone (50% up, 94.3Ma, in Cenomanian stage). Data source: Burnett 1998, fig. 6.2
First occurrence (base): within Aptian Stage (112.95-126.30Ma, base in Aptian stage). Data source: Burnett 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 gaultensis, synonyms included - Biscutum gaultensis; Seribiscutum gaultensis;
  • space-time plot :: Samples map :: Parent: Biscutum

    References:

    Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 132-199. gs :: ::

    Gale, A. S., Kennedy, W. J., Burnett, J. A., Caron, M. & Kidd, B. E. (1996). The Late Albian to Early Cenomanian succession at Mont Risou, near Rosans (Drôme, SE France): an integrated study (ammonites, inoceramids, planktonic foraminifera, nannofossils, oxygen and carbon isotopes). Cretaceous Research. 17: 515-606. gs :: ::

    Hardas, P. & Mutterlose, J. (2008). Calcareous nannofossil assemblages of Oceanic Anoxic Event 2 in the equatorial Atlantic: Evidence of an eutrophication event. Marine Micropaleontology. 66: 52-69. gs :: ::

    Kennedy, W. J. et al. (2000). Integrated stratigraphy across the Aptian-Albian boundary in the Marnes Bleues, at the Col de Pre _-Guittard, Arnayon (Drome), and at Tartonne (Alpes-de-Haute-Provence), France: a candidate Global Boundary Stratotype Section and Boundary Point for the base of the Albian Stage. Cretaceous Research. 21: 591-720. gs :: ::

    Mutterlose, J. (1992). Lower Cretaceous nannofossil biostratigraphy off northwestern Australia (Leg 123). Proceedings of the Ocean Drilling Program, Scientific Results. 123: 343-368. gs :: view :: open

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    Biscutum gaultensis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 16-7-2020

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