Nannotax3 - ntax_main - Octolithus Nannotax3 - ntax_main - Octolithus

Octolithus


Classification: ntax_main -> Holococcoliths -> fossil holococcoliths -> Octolithus
Sister taxa: Daktylethra, Holodiscolithus, Lanternithus, Multipartis, Octolithus, Quadrilateris, Semihololithus, Varolia, Youngilithus, Zygrhablithus ⟩⟨ Aubrysphaera, Corannulus, Orthozygus, Peritrachelina, Unidentified fossil holococcoliths

Daughter taxa (time control age-window is: 0-800Ma)
Octolithus multiplus
Holococccolith with four main blocks and two smaller blocks at either end.
Octolithus sp.
Specimens which cannot be assigned to any established species

Taxonomy:
Citation: Octolithus Romein, 1979
Taxonomic rank: genus
Type species: Octolithus multiplus (Perch-Nielsen, 1973) Romein, 1979 [Tetralithus]

Distinguishing features:
Parent taxon (fossil holococcoliths): Holococcolith genera only known from the fossil record
This taxon: Holoccoliths with distinct rim and cover blocks, typically eight.

Farinacci & Howe catalog pages:
Octolithus *

Search data:
LITHS: holococcolith, elliptical, CROSS-POLARS: R-prominent,
Lith size: 4.5->5.5µm; Segments: 5->7;
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 NP4 zone (100% up, 61.5Ma, in Selandian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within Campanian Stage (72.17-83.65Ma, base in Campanian stage). Data source: Total of ranges of species in this database

Plot of occurrence data:

References:

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

Romein, A. J. T. (1979). Lineages in Early Paleogene calcareous nannoplankton. Utrecht Micropaleontological Bulletin. 22: 1-231. gs O


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Octolithus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 23-1-2026

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=952 Go to Archive.is to create a permanent copy of this page - citation notes



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