Octolithus


Classification: 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: Holococcolith formed of 8 blocks, typically 4 large and 4 small.


Daughter taxa: (blue => in age window 0-800Ma)
Holococcolith formed of about 8 blocks of varying size with no separate central structure.
Specimens not identified to species level

Taxonomy:

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

Farinacci & Howe catalog pages: Octolithus *

Distinguishing features: Holococcolith formed of 8 blocks, typically 4 large and 4 small.

Search data:
TagsLITHS: holococcolith, elliptical, DETAILS: rim-unicyclic,
MetricsLith size: 4->8µm;
Sources: 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 base of Selandian Stage (4% up, 61.5Ma, in Selandian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Campanian Stage (0% up, 83.6Ma, in Campanian stage). Data source: Total of range 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

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


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Octolithus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 30-3-2020

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Short stable page link: http://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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