Nannotax3 - ntax_mesozoic - Farhania Nannotax3 - ntax_mesozoic - Farhania

Farhania


Classification: ntax_mesozoic -> Braarudosphaerales -> Polycyclolithaceae -> Farhania
Sister taxa: Eprolithus, Radiolithus, Farhania, Lithastrinus, Uniplanarius, Quadrum, Micula, Palaeomicula

Distinguishing features:
Parent taxon (Polycyclolithaceae): Nannoliths composed of two superposed wall cycles and a central-area which may be closed, open and vacant, or spanned by a diaphragm-like structure. Elements have tangential c-axis orientation.
This taxon: Eprolithid with narrow wall (formed from 16-24 small, brick-like elements) surrounding a wide central area spanned by an amedian diaphragm.


Daughter taxa (time control age-window is: 0-800Ma)
Farhania varolii
Eprolithid with narrow wall (formed from 16-24 small, brick-like elements) surrounding a wide central area spanned by an amedian diaphragm.
Farhania sp.
Specimens not identified to species level

Taxonomy:

Citation: Farhania Varol, 1992
taxonomic rank: Genus
Type species: Eprolithus varolii Jakubowski, 1986

Farinacci & Howe catalog pages: Farhania *

Distinguishing features:
Parent taxon (Polycyclolithaceae): Nannoliths composed of two superposed wall cycles and a central-area which may be closed, open and vacant, or spanned by a diaphragm-like structure. Elements have tangential c-axis orientation.
This taxon: Eprolithid with narrow wall (formed from 16-24 small, brick-like elements) surrounding a wide central area spanned by an amedian diaphragm.

Search data:
LITHS: nannolith-radiate, circular, cylindrical, CA: closed, CROSS-POLARS: T-prominent,
Lith size: 4->8µm;
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 BC21 zone (100% up, 114.6Ma, in Aptian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within BC19 zone (119.02-119.20Ma, base in Aptian stage). Data source: Total of ranges of species in this database

Plot of occurrence data:

References:

Bown, P. R., Rutledge, D. C., Crux, J. A. & Gallagher, L. T. (1998). Lower Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 86-131. gs O

Varol, O. (1992). Taxonomic revision of the Polycyclolithaceae and its contribution to Cretaceous biostratigraphy. Newsletters on Stratigraphy. 27(93-127): -. gs


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Farhania compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 26-5-2024

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10445 Go to Archive.is to create a permanent copy of this page - citation notes
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