Nannotax3 - ntax_main - Pseudoconus enigma Nannotax3 - ntax_main - Pseudoconus enigma

Pseudoconus enigma


Classification: ntax_main -> Mesozoic nannofossils -> Mesozoic Holococcoliths -> Rarer genera -> Pseudoconus -> Pseudoconus enigma
Sister taxa: P. enigma, P. sp.


Taxonomy:
Citation: Pseudoconus enigma Bown & Cooper 1989
Taxonomic rank: species
Basionym: Pseudoconus enigma * Bown & Cooper 1989

Synonyms:

Distinguishing features:
Parent taxon (Pseudoconus): Solid, truncated-cone-shaped nannolith with rectangular cross-section constructed from minute, roughly equidimensional crystallites. Possibly a holococcolith.
This taxon: Solid, truncated-cone-shaped nannolith with rectangular cross-section constructed from minute, roughly equidimensional crystallites. Possibly a holococcolith.

See also: Faviconus multicolumnatus ;

Search data:
LITHS: holococcolith, quadrate,
Lith size: 4->7µm;
Data source notes: original description & illustrated specimens
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 NJ12a subzone (100% up, 164.6Ma, in Callovian stage). Data source: Bown & Cooper 1998 (fig 4) - zonal event
First occurrence (base): at base of NJ11 zone (0% up, 168.7Ma, in Bajocian stage). Data source: Bown & Cooper 1998 (fig 4) - zonal event

Plot of occurrence data:

References:

Bown, P. R. & Cooper, M. K. E. (1989a). Conical nannofossils in the Mesozoic. In, Crux, J. A. & van Heck, S. E. (eds) Nannofossils and their applications: Proceedings of the 2nd INA Conference, London 1987. British Micropalaeontological Society Publication Series . 98-106. gs

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

Bown, P. R., Cooper, M. K. E. & Lord, A. R. (1988). A calcareous nannofossil biozonation scheme for the early to mid Mesozoic. Newsletters on Stratigraphy. 20: 91-114. gs


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Pseudoconus enigma compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 20-8-2026

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10958 Go to Archive.is to create a permanent copy of this page - citation notes



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