Crucibiscutum pinnatus


Classification: Mesozoic -> Podorhabdales -> Biscutaceae -> Crucibiscutum -> Crucibiscutum pinnatus
Sister taxa: C. hayi, C. neuquenensis, C. pinnatus, C. ryazanicum, C. salebrosum, C. trilensis, P. quadriperforatus, C. sp.,

Distinguishing features: Small (ca 3-5 µm)Crucibiscutum with central cross that is only weakly birefringent and does not fill the central area, delineating four perforations that are clearly visible in XPL.


Taxonomy:

Citation: Crucibiscutum pinnatus (Black, 1971) Rutledge & Bown in Bown et al., 1998
Rank: Species
Basionym: Cruciplacolithus pinnatus Black, 1971
Synonyms: Sollasites pinnatus

Farinacci & Howe catalog pages: Cruciplacolithus pinnatus *

Distinguishing features: Small (ca 3-5 µm)Crucibiscutum with central cross that is only weakly birefringent and does not fill the central area, delineating four perforations that are clearly visible in XPL.

Search data:
TagsLITHS: placolith, elliptical, CA: cross-axial, process, V-UNITS: V-prominent, R-UNITS: R-prominent, DETAILS: ca_disjunct, rim-bicyclic,
MetricsLith size: 3->5µm;
Sources: Rutledge 1994
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within Early Barremian Substage (129.41-130.77Ma, top in Barremian stage). Data source: Bown et al. 1998
First occurrence (base): within Hauterivian Stage (130.77-133.88Ma, base in Hauterivian stage). Data source: Bown et al. 1998

Plot of occurrence data:

  • (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Crucibiscutum

    References:

    Black, M. (1971a). Coccoliths of the Speeton Clay and Sutterby Marl. Proceedings of the Yorkshire Geological Society. 38: 381-424. gs

    Bown, P. R., Rutledge, D. C., Crux, J. A. & Gallagher, L. T. (1998). Early Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 86-131. gs


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    Crucibiscutum pinnatus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 28-2-2020

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10319 Go to Archive.is to create a permanent copy of this page - citation notes



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