Distinguishing features:
Parent taxon (Rarer genera): Less common genera
This taxon: Holococcoliths usually seen in side view and comprising a thick proximal plate and spine or process, typically with a cavity or axial canal.
Daughter taxa (time control age-window is: 0-800Ma) | ||||
Semihololithus bicornus | ||||
Semihololithus priscus | ||||
Semihololithus sp. Specimens not identified to species level |
Taxonomy:
Farinacci & Howe catalog pages: Semihololithus *
Distinguishing features:
Parent taxon (Rarer genera): Less common genera
This taxon: Holococcoliths usually seen in side view and comprising a thick proximal plate and spine or process, typically with a cavity or axial canal.
Search data:
LITHS: holococcolith, elliptical, CA: process, CROSS-POLARS: rim-unicyclic, |
Lith size: 3->7µm; Data source notes: size range of included species |
Geological Range:
Last occurrence (top): at top of Paleocene Epoch (100% up, 56Ma, in Thanetian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within Maastrichtian Stage (66.04-72.17Ma, base in Maastrichtian stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 132-199. gs O Perch-Nielsen, K. (1971b). Einige neue Coccolithen aus dem Paläozän der Bucht von Biskaya und dem Eozän der Labrador See. Bulletin of the Geological Society of Denmark. 21: 347-361. gs References:
Semihololithus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 13-10-2024
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=11073 Go to Archive.is to create a permanent copy of this page - citation notes |
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