Nannotax3 - ntax_mesozoic - Prinsiosphaera triassica subsp. crenulata

Prinsiosphaera triassica subsp. crenulata


Classification: ntax_mesozoic -> Mesozoic non–coccoliths -> Prinsiosphaera -> Prinsiosphaera triassica -> Prinsiosphaera triassica subsp. crenulata
Sister taxa: P. triassica subsp. crenulata

Distinguishing features:
Parent taxon (Prinsiosphaera triassica): Medium to large spherical solid nannolith formed from stacked groups of calcite plates.
This taxon: In LM appears to be formed of crenulate layers.


Taxonomy:

Citation: Prinsiosphaera triassica subsp. crenulata Jafar 1983
Rank: sub-species

Taxonomic discussion:
Considered an intraspecific variant of P. traissica by Bralower et al. (1991) but it is regarded as a distinct form by Rutledge et al. (2015) and R. Howe (pers comm. 2020). It probably should be recombined as a species. [my interpretation - JRY 2020]

Farinacci & Howe catalog pages: P. triassica crenulata *

Distinguishing features:
Parent taxon (Prinsiosphaera triassica): Medium to large spherical solid nannolith formed from stacked groups of calcite plates.
This taxon: In LM appears to be formed of crenulate layers.


Morphology: Shows a crenulate or wavy structure in LM.

Search data:
TagsLITHS:
MetricsLith size: 0->0µm;
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NT2b subzone (201.10-218.91Ma, top in Hettangian stage). Data source: assumed the same as the species
First occurrence (base): within NT2a subzone (218.91-222.89Ma, base in Norian stage). Data source: assumed the same as the species

Plot of occurrence data:

References:

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

Rutledge, D. C., Cole, S., Lawrence, T. & Gard, G. (2015). A new species of late Triassic nannofossil, Botulus triassicus, and observations on Triassic assemblages from the NW Shelf of Australia. In, Bybell, L. (ed.) INA15 abstracts Bohol, Philippines. Journal of Nannoplankton Research. 35(special issue): 71-71. gs V O

Missing or ambiguous references: ; ;


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Prinsiosphaera triassica subsp. crenulata compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 9-12-2021

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=11381 Go to Archive.is to create a permanent copy of this page - citation notes



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