Braarudosphaera perampla


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

Taxonomy:

Citation: Braarudosphaera perampla Bown 2010
Rank: Species

Distinguishing features: Large (>12µm) pentaliths with slightly rounded corners and convex upper surfaces

Farinacci & Howe catalog pages: B. perampla *


Morphology: The convexity is due to the decreasing width of the constituent laminae. The laminae also change shape from stellate at the shortest width and most distal, to straight-edged at the maximum width

Size: 12-20µm

Search data:
TagsLITHS: nannolith-radiate, pentagonal,
CSPH: equant, monomorphic, CROSS-POLARS: T-prominent,
MetricsLith size: 12->21µm; Segments: 5->5; Coccosphere size: 24->42µm; Liths per sphere: 12->12
Data source notes: lith size (diameter) from OD; 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 NP23 zone (29.62-32.02Ma, top in Rupelian stage). Data source: Bown 2010
First occurrence (base): within NP6 zone (58.97-59.54Ma, base in Selandian stage). Data source: Bown 2010

Plot of occurrence data:

References:

Bown, P. R. (2010). Calcareous nannofossils from the Paleocene/Eocene Thermal Maximum interval of southern Tanzania (TDP Site 14). Journal of Nannoplankton Research. 31(1): 11-38. gs V O

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

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

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=150 Go to Archive.is to create a permanent copy of this page - citation notes
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