Speetonia


Classification: Mesozoic -> Podorhabdales -> Cretarhabdaceae -> Speetonia
Sister taxa: Cretarhabdus, Cruciellipsis, Flabellites, Grantarhabdus, Helenea, Mattiolia, Miravetesina, Pickelhaube, Retecapsa, Speetonia,

Distinguishing features: Cretarhabdid with wide central area spanned by a transverse bar.


Daughter taxa: (blue => in age window 0-800Ma)
Cretarhabdid with wide central area spanned by a transverse bar.
Specimens not identified to species level

Taxonomy:

Citation: Speetonia Black, 1971
Rank: Genus
Type species: Speetonia colligata Black, 1971.

Farinacci & Howe catalog pages: Speetonia *

Distinguishing features: Cretarhabdid with wide central area spanned by a transverse bar.

Geological Range:
Last occurrence (top): in upper part of Hauterivian Stage (76% up, 131.5Ma, in Hauterivian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Berriasian Stage (0% up, 145Ma, in Berriasian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

Black, M. (1971a). Coccoliths of the Speeton Clay and Sutterby Marl. Proceedings of the Yorkshire Geological Society. 38: 381-424. gs

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


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Speetonia compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 18-11-2019

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=11105 Go to Archive.is to create a permanent copy of this page - citation notes



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