Pseudoconus


Classification: Mesozoic -> Holococcoliths -> Rarer genera -> Pseudoconus
Sister taxa: Bifidalithus, Bilapillus, Multipartis, Munarinus, Octolithus, Okkolithus, Ottavianus, Pharus, Ramsaya, Russellia, Saepiovirgata, Acuturris, Anfractus, Duocameratus, Lacunolithus-Bown, Metadoga, Nicholasia, Paulpearsonia, Petrobrasiella, Pseudoconus, Semihololithus, Stereorhabdus, Tanzanella, Thecatus, unidentified holococcoliths,

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


Daughter taxa: (blue => in age window 0-800Ma)
Solid, truncated-cone-shaped nannolith with rectangular cross-section constructed from minute, roughly equidimensional crystallites. Possibly a holococcolith.
Specimens not identified to species level

Taxonomy:

Citation: Pseudoconus Bown & Cooper, 1989
Rank: Genus
Type species: Pseudoconus enigma Bown and Cooper, 1989.

Farinacci & Howe catalog pages: Pseudoconus *

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

Geological Range:
Last occurrence (top): in lower part of Callovian Stage (20% up, 165.6Ma, in Callovian stage). Data source: Total of range of species in this database
First occurrence (base): in upper part of Bajocian Stage (82% up, 168.6Ma, in Bajocian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

Bown, P. R. & Cooper, M. K. E. (1989b). New calcareous nannofssils from the Jurassic. Journal of Micropalaeontology. 8: 91-96. 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


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Pseudoconus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 16-12-2019

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10957 Go to Archive.is to create a permanent copy of this page - citation notes



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