Nannotax3 - ntax_mesozoic - Octolithus Nannotax3 - ntax_mesozoic - Octolithus

Octolithus


Classification: ntax_mesozoic -> Holococcoliths -> Rarer genera -> Octolithus
Sister taxa: Bifidalithus, Bilapillus, Multipartis, Munarinus, Octolithus, Okkolithus, Ottavianus, Pharus, Ramsaya, Russellia, Saepiovirgata ⟩⟨ Acuturris, Anfractus, Duocameratus, Lacunolithus-Bown, Metadoga, Nicholasia, Paulpearsonia, Petrobrasiella, Pseudoconus, Semihololithus, Stereorhabdus, Tanzanella, Thecatus, unidentified holococcoliths

Distinguishing features:
Parent taxon (Rarer genera): Less common genera
This taxon: Holococcolith formed of 8 blocks, typically 4 large and 4 small.


Daughter taxa (time control age-window is: 0-800Ma)
Octolithus multiplus
Holococcolith formed of about 8 blocks of varying size with no separate central structure.
Octolithus sp.
Specimens not identified to species level

Taxonomy:

Citation: Octolithus Romein, 1979
taxonomic rank: Genus
Type species: Tetralithus multiplus Perch-Nielsen, 1973

Farinacci & Howe catalog pages: Octolithus *

Distinguishing features:
Parent taxon (Rarer genera): Less common genera
This taxon: Holococcolith formed of 8 blocks, typically 4 large and 4 small.

Search data:
LITHS: holococcolith, elliptical, CROSS-POLARS: rim-unicyclic,
Lith size: 4->8µm;
Data source notes: size range of included species
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: 9-9-2024

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10812 Go to Archive.is to create a permanent copy of this page - citation notes
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