Nannotax3 - ntax_mesozoic - Eprolithus

Eprolithus


Classification: ntax_mesozoic -> Braarudosphaerales -> Polycyclolithaceae -> Eprolithus
Sister taxa: Eprolithus, Radiolithus, Farhania, Lithastrinus, Uniplanarius, Quadrum, Micula, Palaeomicula

Distinguishing features:
Parent taxon (Polycyclolithaceae): Nannoliths composed of two superposed wall cycles and a central-area which may be closed, open and vacant, or spanned by a diaphragm-like structure. Elements have tangential c-axis orientation.
This taxon: Moderately tall, circular to stellate, multiradiate nannoliths with 5-9 petaloid wall-cycle elements surrounding a wide central area spanned by a median diaphragm. Typically H-shaped in side view.


Daughter taxa (time control age-window is: 0-800Ma)
Eprolithus rarus
Eprolithus with six wall-elements.
Eprolithus moratus
Eprolithus with seven wall-elements
Eprolithus octopetalus
Eprolithus with eight wall-elements.
Eprolithus floralis
Eprolithus with nine wall-elements.
Eprolithus apertior
Eprolithus with nine wall-elements and tall wall
Eprolithus antiquus
Circular eprolithid nannolith with narrow wall, wide diaphragm and relatively large central perforation. 
Eprolithus sp.
Specimens not identified to species level

Taxonomy:

Citation: Eprolithus Stover, 1966
Rank: Genus
Type species: Lithastrinus floralis Stradner, 1962, designated by Stover (1966).
Synonyms: Polycyclolithus Forchheimer, 1968

Farinacci & Howe catalog pages: Eprolithus * , Polycyclolithus + *

Distinguishing features:
Parent taxon (Polycyclolithaceae): Nannoliths composed of two superposed wall cycles and a central-area which may be closed, open and vacant, or spanned by a diaphragm-like structure. Elements have tangential c-axis orientation.
This taxon: Moderately tall, circular to stellate, multiradiate nannoliths with 5-9 petaloid wall-cycle elements surrounding a wide central area spanned by a median diaphragm. Typically H-shaped in side view.


Morphology:


Size:


Ecology & Biogeography


Biology & life-cycles

Phylogenetic relations

Search data:
LITHS: nannolith-radiate, star-shaped, cylindrical, CA: vacant, closed, CROSS-POLARS: T-prominent,
Lith size: 3->9µm;
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 Campanian Stage (100% up, 72.1Ma, in Campanian stage). Data source: Total of range of species in this database
First occurrence (base): within Hauterivian Stage (130.77-133.88Ma, base in Hauterivian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

Bown, P. R., Rutledge, D. C., Crux, J. A. & Gallagher, L. T. (1998). Lower Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 86-131. gs O

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

Forchheimer, S. (1968). Die Coccolithen des Gault-Cenoman, Cenoman und Turon in der Bohrung Höllviken I, Süd-west-Schweden. Sveriges Geologiska Undersökning, Series C. #635, 62(6): 1-64. gs

Stover, L. E. (1966). Cretaceous coccoliths and associated nannofossils from France and the Netherlands. Micropaleontology. 12(2): 133-167. gs


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Eprolithus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 8-12-2022

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10431 Go to Archive.is to create a permanent copy of this page - citation notes



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