Nannotax3 - ntax_cenozoic - Braarudosphaera pentagonica

Braarudosphaera pentagonica

Classification: ntax_cenozoic -> Braarudosphaerales -> Braarudosphaeraceae -> Braarudosphaera -> Braarudosphaera pentagonica
Sister taxa: B. bigelowii, B. insecta, B. magnei, B. pentagonica, B. perampla, B. perversus, B. sequela, B. stylifera, B. sp.


Citation: Braarudosphaera pentagonica Mai et al. 1997
Rank: Species

Distinguishing features:
Parent taxon (Braarudosphaera): Pentaliths approximately pentagonal, sutures go to edges of pentagon.
This taxon: Braarudosphaera with 5-sided segments

Farinacci & Howe catalog pages: B. pentagonica *


Coccosphere is still a regular dodecahedron but sutures are zigzag shaped.


Ecology & Biogeography

Biology & life-cycles

Phylogenetic relations

Search data:
LITHS: nannolith-radiate, pentagonal,
CSPH: equant, monomorphic, CROSS-POLARS: T-prominent,
Lith size: 7->10µm; Segments: 5->5; Coccosphere size: 14->20µm; Liths per sphere: 12->12
Data source notes: lith size (diameter) from OD and slightly extended; lith numbers assumed from geometry; csph size calculated from lith size
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Notes: Described from sediments immediately above the K/Pg boundary in shelf sediments from the Netherlands, but way well obe found in older sediments if preservation is suitable
Last occurrence (top): within NP1 zone (65.47-66.04Ma, top in Danian stage). Data source: original description
First occurrence (base): within NP1 zone (65.47-66.04Ma, base in Danian stage). Data source: original description

Plot of occurrence data:


Mai, H. (2001). New coccolithophorid taxa fom the Guelhemmerberg airshaft. Lower Paleocene, The Netherlands. Micropaleontology. 47: 144-154. gs

Mai, H., Willems, H. & von Salis Perch-Nielsen, K. (1997b). Braarudosphaera pentagonica n.sp., a new Braarudosphaera from the lowermost Tertiary of Geulhemmerberg (Geulhem, The Netherlands). Micropaleontology. 43(2): 202-205. gs

Mai, H., von Salis, K., Willems, H. & Romein, A. J. T. (1997a). Fossil coccospheres from the K/T boundary section from Geulhemmerberg, The Netherlands. Micropaleontology. 43: 281-303. gs


Braarudosphaera pentagonica compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 2-12-2022

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

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