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.,

Taxonomy:

Citation: Pemma basquense (Martini, 1959) Báldi-Beke, 1971
Rank: Species
Basionym: Micrantholithus basquensis Martini, 1959
Variants:
Synonyms:
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: M. basquensis * , P. angulatum * , P. balium * , M. altus * , M. basquensis crassus * , P. parisiense primordis [no catalog entry yet], M. parisiensis * , M. parisiensis major * , M. parisiensis parisiensis * , M. serratus * , M. procerus *

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

Search data:
Tagsnannolith-radiate, pentagonal, RIM: tips-bifurcate, CA: pores,
CSPH: not known, T-UNITS: all, T-prominent,
MetricsLith size: 6->17µm; Segments: 5->5;
Data source notes: lith size (diameter) from ODs & illustrated specimens
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:

References:

Báldi-Beke, M. (1971). The Eocene nannoplankton of the Bakony Mountains, Hungary. Annales Instituti Geologici Publici Hungarici. 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 V O

Bramlette, M. N. & Sullivan, F. R. (1961). Coccolithophorids and related nannoplankton of the Early Tertiary in California. Micropaleontology. 7(2): 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 V O

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 V O

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

Perch-Nielsen, K. (1971c). 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 V O

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


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Pemma basquense compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 20-9-2020

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=1035 Go to Archive.is to create a permanent copy of this page - citation notes



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