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.


Citation: Nephrolithus frequens subsp. miniporus (Reinhardt & Górka 1967) Pospichal & Wise 1990
Rank: Sub-species
Basionym: Nephrolithus miniporus Reinhardt & Górka 1967
Notes & discussion: Pospichal & Wise 1990 (p.474) discuss and redscribe this sub-species in detail and emend the concept to only include forms with two pores.

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)

Search data:
TagsLITHS: placolith, asymmetric, CA: plate, pores, closed, V-UNITS: V-prominent, R-UNITS: R-prominent, DETAILS: ca_disjunct, rim-bicyclic,
MetricsLith size: 4->7µm;
Sources: Pospichal & Wise 1990
The morphological data given here can be used on the advanced search page. See also these notes

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


    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


    Nephrolithus frequens subsp. miniporus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 5-4-2020

    Taxon Search:
    Advanced Search

    Short stable page link: Go to to create a permanent copy of this page - citation notes

    Comments (0)

    No comments yet on this page. Please do add comments if you spot any problems, or have information to share

    Add Comment

    * Required information
    Captcha Image
    Powered by Commentics