Biscutum grande


Classification: ntax_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. depravatum, 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:

Farinacci & Howe catalog pages: B. 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: ca_disjunct, bar, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
MetricsLith size: 5.5->7.5µm;
Data source notes: 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:

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. (1987a). 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. (2004a). 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. (1990b). The ICBN: Things you need to know - 1. INA Newsletter. 12(1): 19-20. gs


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Biscutum grande compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 23-1-2021

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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



Comments (1)

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Micaela Chaumeil Rodríguez (Argentina)

Dear Jeremy,

In References the citacion for van Heck should be:

van Heck, S. E. (1990). The ICBN: Things you need to know -1. INA Newsletter. 12(1): 19.

Best regards,

Mica

Gravatar
Jeremy Young (Tonbridge, UK)

Mica - sorry for that and thank you for working out. I have corrected it now.

Jeremy

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