Nannotax3 - ntax_mesozoic - Corollithion

Corollithion


Classification: ntax_mesozoic -> Stephanolithiales -> Stephanolithiaceae -> Corollithion
Sister taxa: Cylindralithus, Darwinilithus, Rotelapillus, Stephanolithion, Stoverius, Stradnerlithus ⟩⟨ Corollithion, Rhombolithion, Truncatoscaphus ⟩⟨ Paralithella, Rectocorona, Thurmannolithion

Distinguishing features:
Parent taxon (Stephanolithiaceae): Murolith (protolith type) coccoliths with rims of non-imbricate V-units and weakly-developed, or vestigial, proximal/inner-cycles (R-units), with central-areas spanned by one to numerous bars. 
This taxon: Polygonal, usually hexagonal; rim bicyclic; central area with 4-6 radial bars


Daughter taxa (time control age-window is: 0-800Ma)
Hexagonal species
Corollithion completum
Roughly hexagonal; central area filled by a plate of multiple elements
Corollithion exiguum
Hexagonal; central area with 6 radial bars.
Corollithion karegae
Hexagonal, small, dark; central area filled by plate of 6 elements
Corollithion kennedyi
Nearly square to subhexagonal; central area with broad axial cross.
Corollithion signum
Hexagonal; central area with axial cross.
Elliptical species
Corollithion covingtonii
Elliptical; central area nearly filled by sub-axial cross
Corollithion madagaskarensis
Elliptical; central area with diagonal cross
Corollithion perch-nielseniae
Elliptical; central area with axial cross and diamond-shaped central structure
Corollithion sp.
Specimens not identified to species level

Taxonomy:

Citation: Corollithion Stradner, 1961
Rank: Genus
Type species: Corollithion exiguum Stradner, 1961

Farinacci & Howe catalog pages: Corollithion *

Distinguishing features:
Parent taxon (Stephanolithiaceae): Murolith (protolith type) coccoliths with rims of non-imbricate V-units and weakly-developed, or vestigial, proximal/inner-cycles (R-units), with central-areas spanned by one to numerous bars. 
This taxon: Polygonal, usually hexagonal; rim bicyclic; central area with 4-6 radial bars

Search data:
TagsLITHS: murolith, ca_disjunct, process, CROSS-POLARS: rim-bicyclic, R-prominent,
MetricsLith size: 3->10µm;
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 Maastrichtian Stage (100% up, 66Ma, in Danian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Valanginian Stage (0% up, 139.4Ma, in Berriasian 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 V O

Stradner, H. (1961). Vorkommen von Nannofossilien im Mesozoikum und Alttertiär. Erdoel-Zeitschrift. 77(3): 77-88. gs


nannotaxlogo400px

Corollithion compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 28-11-2021

Taxon Search:
Advanced Search

Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10276 Go to Archive.is to create a permanent copy of this page - citation notes



Comments (0)

No comments yet on this page. Please do add comments if you spot any problems, or have information to share

Add Comment

* Required information
1000
Captcha Image
Powered by Commentics