Prinsiosphaera triassica


Classification: Mesozoic -> Mesozoic non–coccoliths -> Prinsiosphaera -> Prinsiosphaera triassica
Sister taxa: P. triassica, P. sp.,

Distinguishing features: Medium to large spherical solid nannolith formed from stacked groups of calcite plates.


Daughter taxa: (blue => in age window 0-800Ma)


Taxonomy:

Citation: Prinsiosphaera triassica Jafar, 1983
Rank: Species
Variants: Jafar (983) introduced five subspecies, these are discussed at length by Bralower et al. (1991) who conclude they are intergradataional and of limited value.
Synonyms:
Notes & discussion: The species discussed at length by Bralower et al. (1991), according to them etching and overgrowth can greatly effect the appearance of the species - leading to the various recognised subspaces by Jafar (1983)

Farinacci & Howe catalog pages: Prinsiosphaera triassica * , Prinsiosphaera triassica punctata * , Prinsiosphaera triassica perforata * , Prinsiosphaera triassica crenulata * , Prinsiosphaera triassica hyalina * , Prinsiosphaera triassica noeliae *

Distinguishing features: Medium to large spherical solid nannolith formed from stacked groups of calcite plates.

Geological Range:
Last occurrence (top): within NT2b subzone (201.10-218.91Ma, top in Hettangian stage). Data source: Bown 1998b
First occurrence (base): within NT2a subzone (218.91-222.89Ma, base in Norian stage). Data source: Bown 1998b

Plot of occurrence data:

  • (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Prinsiosphaera

    References:

    Bown, P. R. (1987a). Taxonomy, evolution, and biostratigraphy of Late Triassic-Early Jurassic calcareous nannofossils. Special Papers in Palaeontology. 38: 118-. gs

    Bown, P. R. (1998b). Triassic. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 29-33. gs

    Bralower, T. J., Bown, P. R. & Siesser, W. (1991). Significance of Upper Triassic nannofossils from the Southern Hemisphere (ODP Leg 122, Wombat Plateau, NW Australia). Marine Micropaleontology. 17: 119-154. gs

    Jafar, A. S. (1983). Significance of Late Triassic calcareous Nannoplankton from Austria and Southern Germany. Neues Jahrbuch für Geologie und Paläontologie Abhandlungen. 166: 218-259. gs


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    Prinsiosphaera triassica compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 20-11-2019

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10949 Go to Archive.is to create a permanent copy of this page - citation notes



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