Nannotax3 - ntax_main - Staurolithites lumina Nannotax3 - ntax_main - Staurolithites lumina

Staurolithites lumina


Classification: ntax_main -> Mesozoic nannofossils -> Eiffellithales -> Chiastozygaceae -> Staurolithites -> Staurolithites lumina
Sister taxa: << < S. dentatus, S. eiffellithoides, S. flavus, S. halfanii, S. minutus, S. ngurumahambaensis, S. quadriarcullus, S. siesseri ⟩⟨ S. coroniformis, S. gausorhethium, S. leptostaurus ⟩⟨ S. ormae, S. handleyi, S. laffittei, S. dorfii, S. lumina ⟩⟨ S. imbricatus, S. dicandidula, S. mitcheneri ⟩⟨ S. angustus, S. mutterlosei, S. zoensis ⟩⟨ S. aachenus, S. aenigma, S. ellipticus, S. elongatus, S. integer, S. mielnicensis, S. parma, S. sp.

Taxonomy:

Citation: Staurolithites lumina Bown in Bown & Cooper, 1998
Taxonomic rank: species

Distinguishing features:
Parent taxon (Staurolithites): Loxolith muroliths with relatively narrow rim and wide central area spanned by axial cross bars. The cross is usually spine bearing. Inner/proximal rim cycle is variably developed and so the LM image may be unicyclic or bicyclic. NB The bicyclic/unicyclic separation is simply controlled by how far the inwards the R-units develop so, although it is a useful identification criterion, it almost certainly has no real phylogenetic significance and would be a very poor character for defining genera.
This taxon: Medium sized (4-6 µm), bicyclic, with broad birefringent cross bars, and narrow inner rim cycle.

Farinacci & Howe catalog pages: S. lumina *

Search data:
LITHS: murolith, elliptical, CA: cross-axial, ca_disjunct, process, CROSS-POLARS: rim-bicyclic, V-prominent,
Lith size: 4->6µm;
Data source notes: holotype +/-1µm
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NJ16b subzone (148.67-149.10Ma, top in Tithonian stage). Data source: Bown & Cooper 1998
First occurrence (base): within NJ15b subzone (149.47-156.78Ma, base in Oxfordian stage). Data source: Bown & Cooper 1998

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 O


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Staurolithites lumina compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 21-6-2025

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=11131 Go to Archive.is to create a permanent copy of this page - citation notes



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