Nannotax3 - ntax_mesozoic - Thiersteinia Nannotax3 - ntax_mesozoic - Thiersteinia

Thiersteinia


Classification: ntax_mesozoic -> Arkhangelskiales -> Arkhangelskiellaceae -> Thiersteinia
Sister taxa: Arkhangelskiella, Broinsonia, Thiersteinia

Distinguishing features:
Parent taxon (Arkhangelskiellaceae): Arkhangelskielids with shields predominantly formed of R-units, thus bright in cross-polarised light; V-units often form dark outer rim.
This taxon: Similar to Broinsonia but with well-developed central spine


Daughter taxa (time control age-window is: 0-800Ma)
Thiersteinia ecclesiastica

Thiersteinia sp.
Specimens not identified to species level

Taxonomy:

Citation: Thiersteinia Wise & Watkins in Wise, 1983
taxonomic rank: Genus
Type species: Thiersteinia ecclesiastica Wise & Watkins in Wise, 1983

Farinacci & Howe catalog pages: Thiersteinia *

Distinguishing features:
Parent taxon (Arkhangelskiellaceae): Arkhangelskielids with shields predominantly formed of R-units, thus bright in cross-polarised light; V-units often form dark outer rim.
This taxon: Similar to Broinsonia but with well-developed central spine

Search data:
LITHS: placolith, elliptical, CA: cross-axial, plate, pores, process, closed, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
Lith size: 8->10µm;
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 UC11b subzone (100% up, 85.8Ma, in Coniacian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within UC8a subzone (90.23-90.36Ma, base in Turonian stage). Data source: Total of ranges of species in this database

Plot of occurrence data:

References:

Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 132-199. gs O

Wise, S. W. (1983). Mesozoic and Cenozoic calcareous nannofossils recovered by DSDP Leg 71 in the Falkland Plateau region, Southwest Atlantic Ocean. Initial Reports of the Deep Sea Drilling Project. 71: 481-550. gs O


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Thiersteinia compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 23-4-2024

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=11214 Go to Archive.is to create a permanent copy of this page - citation notes
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