Nannotax3 - ntax_mesozoic - Semihololithus

Nannotax3 - ntax_mesozoic - Semihololithus <title>Nannotax3 - ntax_mesozoic - Semihololithus

Semihololithus

Classification: ntax_mesozoic -> Holococcoliths -> Rarer genera -> Semihololithus
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: 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:

Citation: Semihololithus Perch-Nielsen, 1971

Rank: Genus

Type species: Semihololithus biskayae Perch-Nielsen, 1971

Farinacci & Howe catalog pages: Semihololithus *

Morphology:

Size:

Ecology & Biogeography

Biology & life-cycles

Phylogenetic relations

Search data:

LITHS: holococcolith, elliptical, CA: process, CROSS-POLARS: rim-unicyclic,

Lith size: 3->7µm;
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 Thanetian Stage (100% up, 56Ma, in Thanetian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Maastrichtian Stage (0% up, 72.1Ma, in Campanian stage). Data source: Total of range of species in this database

Plot of occurrence data:

Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
Neptune data: This is a higher taxon page so Neptune data is not plotted. See also: customisable plot Parent: Rarer genera

References:

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 V O

Semihololithus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 30-1-2023

Taxon Search:

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AphiaID: not found
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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