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Nannotax3 - ntax_cenozoic - Blackites fustis Nannotax3 - ntax_cenozoic - Blackites fustis

Blackites fustis


Classification: ntax_cenozoic -> Syracosphaerales -> Rhabdosphaeraceae -> Blackites -> B. inflatus group -> Blackites fustis
Sister taxa: B. aktulagayensis, B. bullatus, B. creber, B. culter, B. flammeus, B. fustis, B. gladius, B. globosus, B. herculesii, B. inflatus, B. kilwaensis, B. ornatus, B. piriformis, B. praeinflatus, B. pseudomorionum, B. rotundus, B. rugosus, B. sextonii, B. turritus, B. virgatus

Taxonomy:

Citation: Blackites fustis Bown, 2005
Taxonomic rank: species
Taxonomic discussion: Resembles Blackites rotundus, Blackites gladius and Blackites bullatus but has distinct spine morphology, particularly the rapid termination to form a domed spine top.

Distinguishing features:
Parent taxon (B. inflatus group): Spine inflated with maximum width above base, many with conspicous bulge
This taxon: Rhabdolith with a relatively wide, hollow ampulliform spine that is initially near parallel-sided, expands distally and then terminates sharply in a domed top, often with a small papilla. The spine reaches a width similar to that of the coccolith. The rim is relatively broad and the outer cycle does not lie distally over the inner cycle.

Farinacci & Howe catalog pages: B. fustis *

Search data:
LITHS: planolith, circular, elliptical, CA: ca_disjunct, grill, process,
Lith size: 5->8µm;
Data source notes: lith size (spine height) from OD & slightly extended
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP15c subzone (42.87-44.12Ma, top in Lutetian stage). Data source: Bown 2005
First occurrence (base): within NP15b subzone (44.12-45.49Ma, base in Lutetian stage). Data source: Bown 2005

Plot of occurrence data:

References:

Bown, P. R. (2005d). Palaeogene calcareous nannofossils from the Kilwa and Lindi areas of coastal Tanzania (Tanzania Drilling Project 2003-4). Journal of Nannoplankton Research. 27(1): 21-95. gs O

Dunkley Jones, T., Bown, P. R. & Pearson, P. (2009). Exceptionally well preserved upper Eocene to lower Oligocene calcareous nannofossils (Prymnesiophycidae) from the Pande Formation (Kilwa Group), Tanzania. Journal of Systematic Palaeontology. 7(4): 359-411. gs

Self-Trail, J. (2011). Paleogene Calcareous Nannofossils of the South Dover Bridge core, Southern Maryland (USA). Journal of Nannoplankton Research. 32(1): 1-28. gs


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Blackites fustis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 16-3-2025

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=104 Go to Archive.is to create a permanent copy of this page - citation notes
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