Braarudosphaera insecta

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


Citation: Braarudosphaera insecta Bown 2016
Rank: Species

Distinguishing features: pentaliths large & with crenulate edges

Farinacci & Howe catalog pages: B. insecta *

Morphology: Large Braarudosphaera with pentaliths that have crenulate edges. The protruding crenulations primarily occur where the sutures meet the pentalith edge.
Differentiation: The crenulate outline is unlike most other Braarudosphaera species and it is much less indented than Micrantholithus bramlettei Deflandre in Deflandre & Fert, 1954. [Bown 2016]

Size: Holotype 11.6µm

Search data:
TagsLITHS: nannolith-radiate, pentagonal, CROSS-POLARS: T-prominent,
MetricsLith size: 10->14µm; Segments: 5->5; Coccosphere size: 20->28µm; 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:
Last occurrence (top): within NP7 zone (58.70-58.97Ma, top in Thanetian stage). Data source: Bown 2016
First occurrence (base): within NP4 zone (61.51-63.25Ma, base in Danian stage). Data source: Bown 2016

Plot of occurrence data:


Bown, P. R. (2016). Paleocene calcareous nannofossils from Tanzania (TDP sites 19, 27 and 38). Journal of Nannoplankton Research. 36(1): 1-32. gs V O

Deflandre, G. & Fert, C. (1954). Observations sur les coccolithophoridés actuels et fossiles en microscopie ordinaire et électronique. Annales de Paléontologie. 40: 115-176. gs


Braarudosphaera insecta compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 1-3-2021

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