Nannotax3 - ntax_mesozoic

Speetonia

Classification: ntax_mesozoic -> Podorhabdales -> Cretarhabdaceae -> Speetonia
Sister taxa: Mattiolia, Wisea ⟩⟨ Speetonia ⟩⟨ Cruciellipsis, Flabellites, Grantarhabdus, Helenea ⟩⟨ Cretarhabdus, Retecapsa, Pickelhaube, Miravetesina

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

Daughter taxa (time control age-window is: 0-800Ma)
				Speetonia colligata Large (8-12 µm) cretarhabdid with wide central area spanned by a transverse bar.
				Speetonia sp. 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.

Search data:

Tags	LITHS: placolith, elliptical, CA: ca_disjunct, bar, CROSS-POLARS: rim-unicyclic, R-prominent,
Metrics	Lith size: 8->12µm; 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): 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:

Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
Neptune data: This is a higher taxon page so Neptune data is not plotted. See also: customisable plot Parent: Cretarhabdaceae

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

Speetonia compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 22-4-2021

Taxon Search:

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Short stable page link: https://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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