Nannotax3 - ntax_mesozoic - Triscutum tiziense

Triscutum tiziense


Classification: ntax_mesozoic -> Podorhabdales -> Mazaganellaceae -> Triscutum -> Triscutum tiziense
Sister taxa: T. beaminsterensis, T. expansus, T. pricatillus, T. sullivanii, T. tiziense, T. sp.

Distinguishing features:
Parent taxon (Triscutum): Three-shielded placoliths with a wide central-area spanned by a proximal net or grill.
This taxon: Large (9-12 µm) Triscutum with broad shields and relatively narrow, vacant, central area.


Taxonomy:

Citation: Triscutum tiziense de Kaenel & Bergen, 1993
Rank: Species

Farinacci & Howe catalog pages: T. tiziense *

Distinguishing features:
Parent taxon (Triscutum): Three-shielded placoliths with a wide central-area spanned by a proximal net or grill.
This taxon: Large (9-12 µm) Triscutum with broad shields and relatively narrow, vacant, central area.

Search data:
TagsLITHS: placolith, elliptical, CA: ca_disjunct, plate, vacant, CROSS-POLARS: rim-bicyclic, R-prominent,
MetricsLith size: 9->12µm;
Data source notes: 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 NJ9 zone (169.69-170.10Ma, top in Bajocian stage). Data source: Bown & Cooper 1998
First occurrence (base): within NJ8a subzone (171.79-174.59Ma, base in Toarcian 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

de Kaenel, E. & Bergen, J. A. (1993). New Early and Middle Jurassic coccolith taxa and biostratigraphy from the eastern proto-Atlantic (Morocco, Portugal and DSDP Site 547B). Eclogae Geologicae Helvetiae. 86(861-907): -. gs V O


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Triscutum tiziense compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 9-12-2021

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=11258 Go to Archive.is to create a permanent copy of this page - citation notes



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