Nannotax3 - ntax_mesozoic - Crucibiscutum pinnatus

Crucibiscutum pinnatus


Classification: ntax_mesozoic -> Podorhabdales -> Biscutaceae -> Crucibiscutum -> Crucibiscutum pinnatus
Sister taxa: C. hayi, P. quadriperforatus ⟩⟨ C. bastetanum, C. gracile, C. neuquenensis, C. pinnatus, C. ryazanicum, C. salebrosum, C. trilensis, C. sp.

Distinguishing features:
Parent taxon (Crucibiscutum): Elliptical with prominent, birefringent, axial cross.
This taxon: 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: C. pinnatus *

Distinguishing features:
Parent taxon (Crucibiscutum): Elliptical with prominent, birefringent, axial cross.
This taxon: 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.


Morphology:


Size:


Ecology & Biogeography


Biology & life-cycles

Phylogenetic relations

Search data:
LITHS: placolith, elliptical, CA: cross-axial, ca_disjunct, process, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
Lith size: 3->5µm;
Data source notes: 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:

References:

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

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


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Crucibiscutum pinnatus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 3-12-2022

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Short stable page link: https://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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