Stoverius


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

Distinguishing features: Narrowly elliptical to circular; rim low, bicyclic; central area wide, spanned by cross bars.


Daughter taxa: (blue => in age window 0-800Ma)
Coccoliths with low, elliptical to circular protolith rim with wide central area spanned by spanned by cross bars that meet at a high angle. Rim image is bicyclic in XPL.
Narrow, elliptical rim with low angle diagonal cross bars.

Narrow, elliptical, bicyclic murolith rim with narrow axial cross bars.
Specimens not identified to species level

Taxonomy:

Citation: Stoverius Perch-Nielsen, 1986
Rank: Genus
Type species: Stoverius achylosus (Stover, 1966) Perch-Nielsen, 1986

Farinacci & Howe catalog pages: Stoverius *

Distinguishing features: Narrowly elliptical to circular; rim low, bicyclic; central area wide, spanned by cross bars.


Morphology remarks: Coccoliths with low, narrow, elliptical to circular murolith (protolith) rim and wide central area spanned by cross bars. Rim image is bicyclic in XPL.

Search data:
TagsLITHS: murolith, circular, elliptical, CA: diagonal cross, V-UNITS: V-prominent, R-UNITS: R-prominent, DETAILS: ca_disjunct, rim-bicyclic,
MetricsLith size: 4->7.5µm;
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 top of Maastrichtian Stage (100% up, 66Ma, in Maastrichtian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Aptian Stage (0% up, 126.3Ma, in Aptian 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

Perch-Nielsen, K. (1986). New Mesozoic and Paleogene calcareous nannofossils. Eclogae Geologicae Helvetiae. 79(3): 835-847. gs

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


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Stoverius compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 18-2-2020

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=11159 Go to Archive.is to create a permanent copy of this page - citation notes



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