Nephrolithus frequens subsp. miniporus


Classification: Mesozoic -> Podorhabdales -> Axopodorhabdaceae -> Nephrolithus -> Nephrolithus frequens -> Nephrolithus frequens subsp. miniporus
Sister taxa: N. frequens subsp. frequens, N. frequens subsp. miniporus,

Distinguishing features: Reniform to elliptical subspecies of N. frequens with only two holes within the central area.


Taxonomy:

Citation: Nephrolithus frequens subsp. miniporus (Reinhardt & Górka 1967) Pospichal & Wise 1990
Rank: Sub-species
Basionym: Nephrolithus miniporus Reinhardt & Górka 1967

Farinacci & Howe catalog pages: Nephrolithus miniporus *

Distinguishing features: Reniform to elliptical subspecies of N. frequens with only two holes within the central area.


Size: 4-7 µm (cf. Pospichal & Wise 1990)

Geological Range:
Last occurrence (top): within Maastrichtian Stage (66.04-72.05Ma, top in Maastrichtian stage). Data source: Burnett 1998
First occurrence (base): in mid part of UC20c subzone (50% up, 67.6Ma, in Maastrichtian stage). Data source: Burnett 1998

Plot of occurrence data:

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

    References:

    Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 132-199. gs

    Pospichal, J. J. & Wise, S. W. (1990b). Maestrichtian calcareous nannofossil biostratigraphy of Maud Rise ODP leg 113 sites 689 and 690, Weddell Sea. Proceedings of the Ocean Drilling Program. Scientific Results. 113: 465-487. gs

    Reinhardt, P. & Górka, H. (1967). Revision of some Upper Cretaceous Coccoliths from Poland and Germany. Neues Jahrbuch für Geologie und Paläontologie Abhandlungen. 129: 240-256. gs

    Thibault, N. (2010). Calcareous nannofossils from the boreal Upper Campanian- Maastrichtian chalk of Denmark. Journal of Nannoplankton Research. 30(1): 39-56. gs


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    Nephrolithus frequens subsp. miniporus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 22-10-2019

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10800 Go to Archive.is to create a permanent copy of this page - citation notes



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