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Nannotax3 - ntax_cenozoic - Blackites kilwaensis Nannotax3 - ntax_cenozoic - Blackites kilwaensis

Blackites kilwaensis


Classification: ntax_cenozoic -> Syracosphaerales -> Rhabdosphaeraceae -> Blackites -> B. inflatus group -> Blackites kilwaensis
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 kilwaensis Bown, 2005
Taxonomic rank: species
Taxonomic discussion: Similar to Rhabdolithus poculi Bóna & Kernerné-Sümegi 1966, described from the Hungarian Miocene, but generally taller and narrower in overall form.

Distinguishing features:
Parent taxon (B. inflatus group): Spine inflated with maximum width above base, many with conspicous bulge
This taxon: Rhabdoliths with a tall, narrow trumpet-like (salpingiform) spine that terminates in a sharply tapering spine top; the coccolith is small and only one cycle is visible in the LM.

Farinacci & Howe catalog pages: B. kilwaensis *

Search data:
LITHS: planolith, elliptical, CA: ca_disjunct, grill, process,
Lith size: 6->11µm;
Data source notes: lith size (spine height) from OD
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP16 zone (40.40-42.87Ma, top in Bartonian stage). Data source: [PRB rough estimate]
First occurrence (base): within NP14b subzone (46.29-47.84Ma, base in Lutetian stage). Data source: Bown 2005

Plot of occurrence data:

References:

Bown, P. R. & Newsam, C. (2017). Calcareous nannofossils from the Eocene North Atlantic Ocean (IODP Expedition 342 Sites U1403–1411). Journal of Nannoplankton Research. 37(1): 25-60. gs O

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


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Blackites kilwaensis 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=111 Go to Archive.is to create a permanent copy of this page - citation notes
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