Pemma basquense

Classification: Coccolithophores -> Braarudosphaerales -> Braarudosphaeraceae -> Pemma -> Pemma basquense
Sister taxa: P. basquense, P. bybelliae, P. papillatum, P. rotundum, P. stradneri, P. triquetra, P. uncinata, P. sp.,


Citation: Pemma basquense (Martini, 1959) Báldi-Beke, 1971
Rank: Species
Basionym: Micrantholithus basquensis Martini, 1959
Notes & discussion: The numerous synonyms / variants described reflect the fact that these ornate Micrantholithus specimens show a great range of variablity in both eleveation and development of the sutural ridges. In additon varying degrees of overgrowth can produce further variation. Attempts at subdiving the gruop do not seem to be profitable.

Distinguishing features: Pemma with crenulate edges.

Farinacci & Howe catalog pages: Micrantholithus basquensis * , Pemma angulatum * , Pemma balium * , Micrantholithus altus * , Micrantholithus basquensis crassus * , Pemma parisiense primordis [no catalog entry yet], Micrantholithus parisiensis * , Micrantholithus parisiensis major * , Micrantholithus parisiensis parisiensis * , Micrantholithus serratus, Micrantholithus procerus *

See also: Micrantholithus bulbosus - similar morphotype but with indentations rather than depressions;

Search data:
TagsLITHS: nannolith-radiate, pentagonal, RIM: tips-bifurcate, CA: pores,
CSPH: not known, T-UNITS: all,
MetricsLith size: 6->17µm; Segments: 5->5;
Sources: lith size (diameter) from ODs & illustrated specimens
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP21 zone (32.92-34.44Ma, top in Rupelian stage). Data source: Dunkley Jones et al., 2009
First occurrence (base): within NP14b subzone (46.29-47.84Ma, base in Lutetian stage). Data source: [PRB rough estimate]

Plot of occurrence data:

  • Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
  • Note to users in China - the diagram may not plot unless you use a VPN since I use google services on the website. If this is a problem please contact me 谢谢.
  • Taxon plotted: Pemma basquense, synonyms included - Micrantholithus aequalis; Micrantholithus basquensis; Pemma angulatum; Pemma balium; Pemma basquense; Pemma basquense crassum; Pemma basquensis; Pemma parisiense; Pemma parisiense primordis; Pemma parisiense subsp. primordis;
  • space-time plot :: Samples map :: Parent: Pemma


    Báldi-Beke, M. (1971). The Eocene nannoplankton of the Bakony Mountains, Hungary. Ann. Inst.Geol. Publ. Hungary. 54(4): 13-38. gs

    Bouché, P. M. (1962a). Nannofossiles calcaires de Lutétien du Bassin de Paris. Revue de Micropaléontologie. 5: 75-103. gs

    Bown, P. R. (2005d). Palaeogene calcareous nannofossils from the Kilwa and Lindi areas of coastal Tanzania (Tanzania Drilling Project 2003-4). Journal of Nannoplankton Research. 27(1): 21-95. gs

    Bramlette, M. N. & Sullivan, F. R. (1961). Coccolithophorids and related nannoplankton of the Early Tertiary in California. Micropaleontology. 7(129-188): -. gs

    Bukry, D. & Bramlette, M. N. (1969b). Some new and stratigraphically useful calcareous nannofossils of the Cenozoic. Tulane Studies in Geology. 7: 131-142. gs

    Bybell, L. M. & Gartner, S. (1972). Provincialism among mid-Eocene calcareous nannofossils. Micropaleontology. 18(319-336): -. gs

    Bybell, L. (1975). Middle Eocene calcareous nannofossils at Little Stave Creek, Alabama. Tulane Studies in Geology and Paleontology. 11(4): 177-247. gs

    Martini, E. (1959c). Discoasteriden und verwandte Formen in NW-deutschen Eozän (Coccolithophorida). 2. Stratigraphische Auswertung. Senckenbergiana Lethaea. 40: 137-157. gs

    Perch-Nielsen, K. (1971b). Elektronenmikroskopische untersuchungen an Coccolithen und verwandten Formen aus dem Eozan von Danemark. Biologiske Skrifter. Kongelige Danske Videnskabernes Selskab. 18(3): 1-76. gs

    Self-Trail, J. (2011). Paleogene Calcareous Nannofossils of the South Dover Bridge core, Southern Maryland (USA). Journal of Nannoplankton Research. 32(1): 1-28. gs

    Varol, O. (1998). Palaeogene. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 200-224. gs


    Pemma basquense compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 19-1-2020

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