Nannotax3 - ntax_mesozoic - Miravetesina

Miravetesina


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

Distinguishing features:
Parent taxon (Cretarhabdaceae): Regular placoliths; central-area spanned by elevated distal structure typically with cross bars and central spine.
The distal shield usually weakly bicyclic, with narrow outer-cycle and broad inner-cycle; elements usually radial and non-imbricate. LM image is moderately birefringent. V/R structure unclear.

This taxon: Cretarhabdids with central area spanned by narrow axial cross and fine net.


Daughter taxa (time control age-window is: 0-800Ma)
Miravetesina bergenii
Like M. favula but medium-sized (6-8 µm), with more pronounced axial cross, and younger age. Late Creteceous
Miravetesina favula
Large (7-12 µm) cretarhabdids with central area spanned by narrow axial cross and fine net. Late Jurassic-Early Cretaceous
Miravetesina sp.
Specimens not identified to species level

Taxonomy:

Citation: Miravetesina Grün in Grün and Allemann, 1975
Rank: Genus
Type species: Miravetesina favula Grün in Grün and Allemann, 1975.

Farinacci & Howe catalog pages: Miravetesina *

Distinguishing features:
Parent taxon (Cretarhabdaceae): Regular placoliths; central-area spanned by elevated distal structure typically with cross bars and central spine.
The distal shield usually weakly bicyclic, with narrow outer-cycle and broad inner-cycle; elements usually radial and non-imbricate. LM image is moderately birefringent. V/R structure unclear.

This taxon: Cretarhabdids with central area spanned by narrow axial cross and fine net.


Morphology: Arguably a junior synonym of Cretarhabdus.

Search data:
TagsLITHS: placolith, elliptical, CA: ca_disjunct, CROSS-POLARS: R-prominent,
MetricsLith size: 6->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): at top of Maastrichtian Stage (100% up, 66Ma, in Danian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Kimmeridgian Stage (0% up, 157.3Ma, in Oxfordian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

Bown, P. R. & Cooper, M. K. E. (1998). Jurassic. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 34-85. gs

Grün, W. & Allemann, F. (1975). The Lower Cretaceous of Caravaca (Spain): Berriasian Calcareous Nannoplankton of the Miravetes Section (Subbetic Zone, Prov. of Murcia). Eclogae Geologicae Helvetiae. 68: 147-211. gs V O


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Miravetesina compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 24-9-2021

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10685 Go to Archive.is to create a permanent copy of this page - citation notes



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