Biscutum grande


Classification: Mesozoic -> Podorhabdales -> Biscutaceae -> Biscutum -> Biscutum grande
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: Large, normally elliptical Biscutum with relatively broad bright inner cycle and central area spanned by a transverse bar.


Taxonomy:

Citation: Biscutum grande Bown, 1987
Rank: Species
Synonyms: Palaeopontosphaera binodosa Prins 1969 (nomen nudum) [according to Bergen ]
Biscutum grandis 
Bown, 1987 - orignal spelling, this was corrected by van Heck 1990 
Palaeopontosphaera grande

Farinacci & Howe catalog pages: Biscutum grandis *

Distinguishing features: Large, normally elliptical Biscutum with relatively broad bright inner cycle and central area spanned by a transverse bar.

Search data:
TagsLITHS: placolith, elliptical, CA: bar, V-UNITS: V-prominent, R-UNITS: R-prominent, DETAILS: ca_disjunct, rim-bicyclic,
MetricsLith size: 5.5->7.5µm;
Sources: Mattioli et al. 2004, original description
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NJ6 zone (180.49-181.63Ma, top in Toarcian stage). Data source: Bown & Cooper 1998
First occurrence (base): within NJ5b subzone (181.63-184.03Ma, base in Pliensbachian stage). Data source: Bown & Cooper 1998

Plot of occurrence data:

  • (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) 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. (1987). Taxonomy, evolution, and biostratigraphy of Late Triassic-Early Jurassic calcareous nannofossils. Special Papers in Palaeontology. 38: 1-118. gs :: ::

    Mattioli, E., Pittet, B., Young, J. R. & Bown, P. R. (2004). Biometric analysis of Pliensbachian-Toarcian (Lower Jurassic) coccoliths of the family Biscutaceae: intra- and interspecific variability versus palaeoenvironmental influence. In, Villa, G. , Lees, J. A. & Bown, P. R. (eds) Calcareous Nannofossil Palaeoecology and Palaeocenographic Reconstructions, Proceedings of the INA9 conference, Parma 2002. Marine Micropaleontology. 52(1-4): 5-27. gs :: ::

    Menini, A., Mattioli, E., Spangenberg, J. E., Pittet, B. & Suan, G. (2018). New calcareous nannofossil and carbon isotope data for the Pliensbachian/Toarcian boundary (Early Jurassic) in the western Tethys and their paleoenvironmental implications. Newsletters on Stratigraphy. -. gs :: ::

    Prins, B. (1969). Evolution and stratigraphy of cocolithinids from the Lower and Middle Lias. In, Bronnimann, P. & Renz, H. H. (eds) Proceedings of the First International Conference on Planktonic Microfossils, Geneva 1967. E. J. Brill, Leiden 547-558. gs :: ::

    van Heck, S. E. (1990). On the validity of Pseudoemiliania lacunosa Kamptner 1963 ex Gartner 1967. INA Newsletter. 12(2): 11-12. gs :: view :: open


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    Biscutum grande compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 5-7-2020

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10083 Go to Archive.is to create a permanent copy of this page - citation notes



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