Nannotax3 - ntax_mesozoic - Vacherauvillius

Vacherauvillius


Classification: ntax_mesozoic -> Eiffellithales -> Chiastozygaceae -> Vacherauvillius
Sister taxa: Amphizygus, Archaeozygodiscus, Gorkaea, Placozygus, Reinhardtites, Tranolithus, Zeugrhabdotus ⟩⟨ Chiastozygus ⟩⟨ Staurolithites, Diadorhombus, Rhabdophidites ⟩⟨ Ahmuellerella, Bukrylithus, Diloma, Heteromarginatus, Misceomarginatus, Monomarginatus, Vacherauvillius ⟩⟨ Braloweria, Clepsilithus, Crepidolithus, Loxolithus, Neocrepidolithus, Tubirhabdus, C. - unidentified

Distinguishing features:
Parent taxon (Chiastozygaceae): Typical Eiffelithales - rim with well outer/upper clockwise-imbricate V-units and lower/inner R-units. Central area open or spanned by disjunct cross or bar supporting a spine.
This taxon: Muroliths with axial, lateral and concentric bars spanning the central-area.


Daughter taxa (time control age-window is: 0-800Ma)
Vacherauvillius implicatus
Very small (<3µm) muroliths with axial, lateral and concentric bars spanning the central-area.
Vacherauvillius sp.
Specimens not identified to species level

Taxonomy:

Citation: Vacherauvillius Goy in Goy et al., 1979
Rank: Genus
Type species: not designated
Variants:

Farinacci & Howe catalog pages: Vacherauvillius * , Saeptella *

Distinguishing features:
Parent taxon (Chiastozygaceae): Typical Eiffelithales - rim with well outer/upper clockwise-imbricate V-units and lower/inner R-units. Central area open or spanned by disjunct cross or bar supporting a spine.
This taxon: Muroliths with axial, lateral and concentric bars spanning the central-area.


Morphology:


Size:


Ecology & Biogeography


Biology & life-cycles

Phylogenetic relations

Search data:
LITHS: murolith, elliptical, CA: concentric-ring(s), cross-axial, ca_disjunct, grill, process, CROSS-POLARS: rim-unicyclic,
Lith size: 2->3µm;
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 Toarcian Stage (100% up, 174.2Ma, in Toarcian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Toarcian Stage (0% up, 182.7Ma, in Pliensbachian 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 O

Goy, G., Noël, D. & Busson, G. (1979). Les conditions de sédimentation des schistes-carton (Toarcien inf.) du bassin de Paris déduites de l'étude des nannofossiles calcaires et des diagraphies. Documents des laboratories de géologie Lyon. 75: 33-57. gs O


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Vacherauvillius compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 5-12-2022

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=11292 Go to Archive.is to create a permanent copy of this page - citation notes



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