Cruciplacolithus nishii


Classification: ntax_cenozoic -> Coccolithales -> Coccolithaceae -> Cruciplacolithus -> Cruciplacolithus nishii
Sister taxa: C. neohelis, C. kanungoi ⟩⟨ C. cruciformis, C. flavius, C. klausii, C. nishii, C. tarquinius ⟩⟨ C. asymmetricus, C. edwardsii, C. frequens ⟩⟨ C. intermedius, C. primus, C. subrotundus, C. tenuis ⟩⟨ C. filigranus, C. inseadus, C. latipons, C. sp.

Taxonomy:

Citation: Cruciplacolithus nishii Bown & Newsam 2017
Rank: Species

Distinguishing features: Small to medium sized Cruciplacolithus with narrow shields and wide central area spanned by narrow axial crossbars bearing a spine.

Farinacci & Howe catalog pages: C. nishii *


Morphology: Differentiation: Distinguised from other Cruciplacolithus by the wide central area and spine-bearing cross – an unusual feature amongst Cenozoic placoliths. [Bown & Newsam 2017]


Size: Holotype L = 4.2μm (Paratype L = 4.3μm). [Bown & Newsam 2017]

Search data:
TagsLITHS: placolith, elliptical, CA: cross-axial, ca_disjunct, process,
CSPH: equant, monomorphic, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
MetricsLith size: 4->6µm;
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP17 zone (37.32-40.40Ma, top in Priabonian stage). Data source: Bown & Newsam 2017
First occurrence (base): within NP16 zone (40.40-42.87Ma, base in Lutetian stage). Data source: Bown & Newsam 2017

Plot of occurrence data:

References:

Bown, P. R. & Newsam, C. (2017). Calcareous nannofossils from the Eocene North Atlantic Ocean (IODP Expedition 342 Sites U1403–1411). Journal of Nannoplankton Research. 37(1): 25-60. gs V O

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Cruciplacolithus nishii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 28-2-2021

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=391 Go to Archive.is to create a permanent copy of this page - citation notes
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