Nannotax3 - ntax_mesozoic - Watkinsia

Watkinsia


Classification: ntax_mesozoic -> Nannoliths inc sedis -> Nannoliths inc sed - other -> Watkinsia
Sister taxa: Ceratolithina, Ceratolithoides, Liliasterites, Marthasterites, Orthogonoides, Rhomboaster, Tripinnalithus, Watkinsia

Distinguishing features:
Parent taxon (Nannoliths inc sed - other): Nannolith genera without clear affinities to any other genera
This taxon: Large, narrowly elliptical, structureless base from which a broad, flat blade emerges.


Daughter taxa (time control age-window is: 0-800Ma)
Watkinsia pedalion
Large, narrowly elliptical, structureless base from which a broad, flat blade emerges.
Watkinsia sp.
Specimens not identified to species level

Taxonomy:

Citation: Watkinsia Covington, 1994
Rank: Genus
Type species: Watkinsia pedalion Covington, 1994

Farinacci & Howe catalog pages: Watkinsia *

Distinguishing features:
Parent taxon (Nannoliths inc sed - other): Nannolith genera without clear affinities to any other genera
This taxon: Large, narrowly elliptical, structureless base from which a broad, flat blade emerges.

Search data:
TagsLITHS: nannolith-other, asymmetric, quadrate, rod-shaped, CROSS-POLARS: 1ou,
MetricsLith size: 15->25µm; Segments: 1->1;
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 Santonian Stage (100% up, 83.6Ma, in Campanian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Santonian Stage (0% up, 86.3Ma, in Coniacian 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

Covington, M. (1994). New taxa from the Niobrara Formation (Upper Cretaceous) of Kansas, USA. Journal of Nannoplankton Research. 16(3): 121-131. gs V O


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

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=11295 Go to Archive.is to create a permanent copy of this page - citation notes



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