Nannotax3 - ntax_main - Braarudosphaera Nannotax3 - ntax_main - Braarudosphaera

Braarudosphaera


Classification: ntax_main -> Braarudosphaerales -> Braarudosphaeraceae -> Braarudosphaera
Sister taxa: Braarudosphaera, Micrantholithus ⟩⟨ Hexadelus, Pemma, Pentaster ⟩⟨ Bukryaster, Trapezopentus

Daughter taxa (time control age-window is: 0-800Ma)Granddaughter taxa
Braarudosphaera bigelowii
Pentaliths pentagonal with sraight edges and flat top surface
Braarudosphaera bigelowii - Cretaceous

Braarudosphaera - Cenozoic

Braarudosphaera alta
Braarudosphaera insecta
Braarudosphaera magnei
Braarudosphaera pentagonica
Braarudosphaera perampla
Braarudosphaera perversus
Braarudosphaera sequela
Braarudosphaera stylifera
Braarudosphaera sp.

Braarudosphaera - Cretaceous

Braarudosphaera amputans
Braarudosphaera batilliformis
Braarudosphaera pseudobatilliformis
Braarudosphaera turbinea
Braarudosphaera wendlerae
Braarudosphaera africana
Braarudosphaera sp. Cretaceous


Taxonomy:
Citation: Braarudosphaera Deflandre, 1947
Taxonomic rank: genus
Type species: Pontosphaera bigelowii Gran & Braarud 1935.
Synonyms: Eodiscoaster Martini 1961 - based on an overgrown specimen of Braarudosphaera according to Martini (1971) and Perch-Nielsen (1985)
Variants: Quinquerhabdus Bukry & Bramlette 1969 - genus for strongly elevated and abruptly tapering specimens. In practice most authors would include these in Braarudosphaera.

Distinguishing features:
Parent taxon (Braarudosphaeraceae): Coccospheres pentagonal dodecahedra formed of five pentagonal plates
This taxon: Pentaliths approximately pentagonal, sutures go to edges of pentagon.

Farinacci & Howe catalog pages:
Braarudosphaera * , Quinquerhabdus * , Eodiscoaster *


Morphology:
Pentaliths approximately pentagonal, sutures go to edges of pentagon. NB In Micrantholithus sutures go to vertices of the pentagon.

Search data:
Lith size: 2->21µm; Segments: 5->5; Coccosphere size: 4->42µm; Liths per sphere: 12->12
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): Extant. Data source: Total of ranges of the species in this database
First occurrence (base): within Aptian Stage (113.20-121.40Ma, base in Aptian stage). Data source: Total of ranges of species in this database

Plot of occurrence data:

References:

Bown, P. R., Rutledge, D. C., Crux, J. A. & Gallagher, L. T. (1998). Lower Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 86-131. gs O

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

Deflandre, G. (1947a). Braarudosphaera nov. gen., type d'une famille nouvelle de Coccolithophorides actuels a elements composites. Comptes rendus hebdomaire de l'Académie des sciences, Paris. 225: 439-441. gs

Martini, E. (1961). Nannoplankton aus dem Tertiär und der obersten Kreide von SW-Frankreich. Senckenbergiana Lethaea. 42: 1-32. gs

Martini, E. (1971a). Die Typen und Typoide des Natur-Museums Senckenberg, 46): Fossiles Nannoplankton. Senckenbergiana Lethaea. 52: 115-127. gs

Perch-Nielsen, K. (1985). Cenozoic calcareous nannofossils. In, Bolli, H. M., Saunders, J. B. & Perch-Nielsen, K. (eds) Plankton Stratigraphy. Cambridge University Press, Cambridge (1): 427-555. gs


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Braarudosphaera compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 12-5-2026

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=145 Go to Archive.is to create a permanent copy of this page - citation notes



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