Nannotax3 - ntax_cenozoic - Craticullithus cassus

Craticullithus cassus

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

Bown 2010 pl4-fig12.JPG
Bown_2005_JNR_pl6-fig1.jpg
Bown 2010 pl4-fig13.JPG
Bown-JNR2016-pl11-13.JPG
Bown-JNR2016-pl3-26.JPG
Bown-JNR2016-pl3-27.JPG
Bown-JNR2016-pl3-28.JPG
Bown_2005_JNR_pl6-fig2.jpg
Bown_2005_JNR_pl6-fig3.jpg
ShamrockWatkins2012-pl4-fig8.jpg

Taxonomy:

Citation: Craticullithus? cassus (Bown, 2005) Bown, 2010

Rank: Species

Basionym: Cruciplacolithus cassus Bown 2005

Synonyms: Cruciplacolithus cassus

Taxonomic discussion: As this species has a complex central area grill and coccolithacean rim it is tentatively placed into the genus Craticullithus.

Distinguishing features: Medium sized, bicyclic placolith with dark outer-cycle, slightly brighter inner cycle and relatively wide central-area (approximately same width as shields). In SEM a central-area net is evident.

Farinacci & Howe catalog pages: C. cassus *

Morphology: The distal shield appears to be bicyclic: the outer cycle elements are joined along distinctly kinked sutures; the inner cycle appears to have a smooth upper surface and the sutures are less clear but are broadly radial. The central area is spanned by a perforate plate formed from small elements.

Search data:

Tags	LITHS: placolith, elliptical, CA: plate, CSPH: equant, monomorphic, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
Metrics	Lith size: 5->8µm;

The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP11 zone (53.70-54.17Ma, top in Ypresian stage). Data source: Bown, 2010
First occurrence (base): within NP7 zone (58.70-58.97Ma, base in Thanetian stage). Data source: Bown, 2010

Plot of occurrence data:

Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
(NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Craticullithus

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. (2016). Paleocene calcareous nannofossils from Tanzania (TDP sites 19, 27 and 38). Journal of Nannoplankton Research. 36(1): 1-32. gs V O

Shamrock, J. L. & Watkins, D. K. (2012). Eocene calcareous nannofossil biostratigraphy and community structure from Exmouth Plateau, Eastern Indian Ocean (ODP Site 762). Stratigraphy. 9(1): 1-11. gs

Craticullithus cassus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 21-1-2021

Taxon Search:

Advanced Search

Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=373 Go to Archive.is to create a permanent copy of this page - citation notes

Comments (0)

No comments yet on this page. Please do add comments if you spot any problems, or have information to share

Add Comment

* Required information

1000

Notify me of new comments via email.

Remember my form inputs on this computer.