arrayname: original
Taxonomy:
Distinguishing features:
Parent taxon (Braarudosphaera): Pentaliths approximately pentagonal, sutures go to edges of pentagon.
This taxon: pentaliths large & with crenulate edges
Farinacci & Howe catalog pages: B. insecta *
Morphology:
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:
LITHS: nannolith-radiate, pentagonal, CROSS-POLARS: T-prominent, |
Lith 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 |
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 O Deflandre, G. & Fert, C. (1954). Observations sur les coccolithophoridés actuels et fossiles en microscopie ordinaire et électronique. Annales de Paléontologie. 40: 115-176. gsReferences:
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Braarudosphaera insecta compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 22-4-2025
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=147 Go to Archive.is to create a permanent copy of this page - citation notes |
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