Hexalithus gardetiae


Classification: ntax_mesozoic -> Braarudosphaerales -> Transitional genera -> Hexalithus -> Hexalithus gardetiae
Sister taxa: H. gardetiae, H. noeliae, H. strictus, H. sp.

Distinguishing features: Minute (2-4 µm), subcircular nannolith with six elements.


Taxonomy:

Citation: Hexalithus gardetiae Bukry, 1969
Rank: Species
Taxonomic discussion: This minute nannolith is a well-established component of Campanian assemblages, it is, however, unlikely to be directly related to the Tithonian/Berriasiain Hexalithus species, so it probably should be placed in a new genus.

Farinacci & Howe catalog pages: H. gardetae *

Distinguishing features: Minute (2-4 µm), subcircular nannolith with six elements.

Search data:
TagsLITHS: nannolith-radiate, polygonal, CA: closed,
CSPH: equant, monomorphic, CROSS-POLARS: T-prominent,
MetricsLith size: 2->4µm; Segments: 6->6;
Data source notes: original description & illustrated specimens
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Notes: FO in UC13 in N England, UC15b in Tethyan realm (Burnett 1998)
Last occurrence (top): within Campanian Stage (72.05-83.64Ma, top in Campanian stage). Data source: Burnett 1998
First occurrence (base): in lower part of UC12 zone (25% up, 85Ma, in Santonian stage). Data source: Burnett 1998, fig 6.4

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

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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Hexalithus gardetiae compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 18-5-2021

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10525 Go to Archive.is to create a permanent copy of this page - citation notes



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