Cylindralithus sculptus


Classification: ntax_mesozoic -> Stephanolithiales -> Stephanolithiaceae -> Cylindralithus -> Cylindralithus sculptus
Sister taxa: C. biarcus, C. coronatus, C. sculptus, C. serratus ⟩⟨ C. duplex, C. oweinae, C. flat-top ⟩⟨ C. nieliae, C. sp.

Distinguishing features: Circular; open central area; parallel sided


Taxonomy:

Citation: Cylindralithus sculptus Bukry, 1969
Rank: Species

Farinacci & Howe catalog pages: C. sculptus *

Distinguishing features: Circular; open central area; parallel sided

Search data:
TagsLITHS: murolith, circular, cylindrical, hollow, CA: ca_disjunct, vacant, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
MetricsLith size: 6->9µm;
Data source notes: illustrated specimens
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): at top of Maastrichtian Stage (100% up, 66Ma, in Maastrichtian stage). Data source: Lees & Bown 2005 - consistently present to end Cret
First occurrence (base): at base of UC2c subzone (0% up, 97.3Ma, in Cenomanian stage). Data source: Burnett 1998 (subzonal marker), fig.6.2

Plot of occurrence data:

References:

Bukry, D. (1969). Upper Cretaceous coccoliths from Texas and Europe. University of Kansas Paleontological Contributions, Articles. 51 (Protista 2): 1-79. gs V O

Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 132-199. gs V O

Hattner, J. G. & Wise, S. W. (1980). Upper Cretaceous calcareous nannofossil biostratigraphy of South Carolina. South Carolina Geology. 24: 41-117. gs

Lees, J. A. & Bown, P. R. (2005). Upper Cretaceous calcareous nannofossil biostratigraphy, ODP Leg 198 (Shatsky Rise, Northwest Pacific Ocean). Proceedings of the Ocean Drilling Program, Scientific Results. 198: 1-60. gs V O

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

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10361 Go to Archive.is to create a permanent copy of this page - citation notes
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Comments (1)

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Roque Aguado (Linares, Spain)

Hi all,

I think one of the specimens figured in nannotax as Cylindralithus sculptus (identified as Burnett1998-6-04-27.jpg, from Mississippi, USA; image 7) is misidentified, and most probably it is a top view of Perchnielsenella stradneri (note the completely filled central diaphragm and the curved elements of the periphery).

Cheers.

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Jeremy Young (Tonbridge, UK)

Roque - thanks for the comment. I am not an expert on this group, in fact I find them rather confusing. I see what you mean, but I will ask Jackie Lees to comment on this.

NB I have moved your comment to the C. sculptus page as it is easiest to have comment on the page they refer to (they also get shown on the recent comments page so they do not just get hidden)

Jeremy

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Jackie Lees (Houston, US)

Hey, Roque! You're possibly correct on that one image... Both species have high-order birefringence, being thickly calcified, and both have different images depending on which end of the coccolith you're focusing on, so basically, both species are best identified on their side views.

Cheers, Jackie

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Jeremy Young (Tonbridge, UK)

I have now moved the image in question to Cylindralithus sp., since we do not have a definitive identification for it.

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