Craticullithus cancellus


Classification: Coccolithophores -> Coccolithales -> Coccolithaceae -> Craticullithus -> Craticullithus cancellus
Sister taxa: C. cancellus, C. clathrus, C. lamina, C. cassus, C. sp.,

Taxonomy:

Citation: Craticullithus cancellusBown, 2010
Rank: Species
Notes & discussion: The coccoliths have not been unequivocally observed in the LM, but they may correspond to low birefringence placoliths with open central areas, the central area laths being too small or non-birefringent to be visible.

Distinguishing features: Small to medium, elliptical placolith coccoliths with broad central-areas spanned by lattice-like grills that are dominated by transverse bars.

Farinacci & Howe catalog pages: C. cancellus *


Morphology remarks: The distal shield is formed from elements with distinctly kinked and stepped sutures, and the proximal shield appears to be unicyclic and formed from elements joined along strongly clockwise twisting sutures. Around 12-25 lath-like bars make up the central grill with one central longitudinal bar, several smaller longitudinal bars and multiple transverse bars forming the rest of the structure.

Search data:
Tagsplacolith, elliptical, CA: grill, vacant,
CSPH: spherical, equant, monomorphic, V-UNITS: distal shield, px-tube, V-prominent, R-UNITS: c-str, ds-tube, prox shield, R-prominent, DETAILS: ca_disjunct, rim-bicyclic, isogyres oblique,
MetricsLith size: 3.5->6µm;
Sources:
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP9 zone (55.86-57.21Ma, top in Ypresian stage). Data source: Bown, 2010
First occurrence (base): within NP9 zone (55.86-57.21Ma, base in Thanetian stage). Data source: Bown, 2010

Plot of occurrence data:

References:

Bown, P. R. (2005d). Palaeogene calcareous nannofossils from the Kilwa and Lindi areas of coastal Tanzania (Tanzania Drilling Project 2003-4). Journal of Nannoplankton Research. 27(1): 21-95. gs V O

Bown, P. R. (2010). Calcareous nannofossils from the Paleocene/Eocene Thermal Maximum interval of southern Tanzania (TDP Site 14). Journal of Nannoplankton Research. 31(1): 11-38. gs V O

Bown, P. R., Gibbs, S. J., Sheward, R., O’Dea, S. & Higgins, D. (2014). Searching for cells: the potential of fossil coccospheres in coccolithophore research. Journal of Nannoplankton Research. 34(special): 5-21. gs V O


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Craticullithus cancellus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 26-9-2020

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=372 Go to Archive.is to create a permanent copy of this page - citation notes



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