Faviconus


Classification: Mesozoic -> Braarudosphaerales -> Nannoconaceae -> Faviconus
Sister taxa: Faviconus, Nannoconus, Polycostella,

Distinguishing features: Long, narrow columnar nannoliths formed from stacks of calcite laths around a narrow axial canal. May occur as linked groups of multiple columns.


Daughter taxa: (blue => in age window 0-800Ma)
Tall, narrow columnar nannoliths formed from stacks of calcite laths around a narrow axial canal. May occur as linked groups of multiple columns.
Specimens not identified to species level

Taxonomy:

Citation: Faviconus Bralower in Bralower et al., 1989
Rank: Genus
Type species: Faviconus multicolumnatus Bralower in Bralower et al., 1989.

Farinacci & Howe catalog pages: Faviconus * , ,

Distinguishing features: Long, narrow columnar nannoliths formed from stacks of calcite laths around a narrow axial canal. May occur as linked groups of multiple columns.


Morphology remarks: Similar to nannoconids but the constituent stacked cycles do not appear to spiral.

See also: Pseudoconus enigma ;

Geological Range:
Last occurrence (top): in lower part of Berriasian Stage (26% up, 143.5Ma, in Berriasian stage). Data source: Total of range of species in this database
First occurrence (base): near top of Oxfordian Stage (89% up, 157.9Ma, 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

Bralower, T. J., Monechi, S. & Thierstein, H. R. (1989). Calcareous nannofossil zonation of the Jurassic-Cretaceous boundary interval and correlation with the geomagnetic polarity timescale. Marine Micropaleontology. 14: 153-235. gs


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Faviconus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 22-7-2019

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10448 Go to Archive.is to create a permanent copy of this page - citation notes



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