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Nannotax3 - ntax_cenozoic - Blackites ornatus Nannotax3 - ntax_cenozoic - Blackites ornatus

Blackites ornatus


Classification: ntax_cenozoic -> Syracosphaerales -> Rhabdosphaeraceae -> Blackites -> B. inflatus group -> Blackites ornatus
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 ornatus Bown & Dunkley Jones, 2006
Taxonomic rank: species
Taxonomic discussion: Cross-hatch ornamentation is a common feature found towards the spine ends of many Blackites species, but B. ornatus spines are more completely ornamented. Bramletteius Gartner, 1969 spines are similarly flat, but have no ornamentation.

Distinguishing features:
Parent taxon (B. inflatus group): Spine inflated with maximum width above base, many with conspicous bulge
This taxon: Large, table tennis bat-shaped spine covered in fine, cross-hatch ornamentation when viewed in XPL. The spines have not been found attached to a coccolith base, and they appear to be rather flat.

Farinacci & Howe catalog pages: B. ornatus *

Search data:
LITHS: planolith, circular, elliptical, CA: ca_disjunct, grill, process,
Lith size: 8->12µm;
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 NP16 zone (40.40-42.87Ma, top in Bartonian stage). Data source: Bown & Dunkley Jones, 2006
First occurrence (base): within NP15c subzone (42.87-44.12Ma, base in Lutetian stage). Data source: Bown & Dunkley Jones, 2006

Plot of occurrence data:

References:

Bown, P. R. & Dunkley Jones, T. (2006). New Paleogene calcareous nannofossil taxa from coastal Tanzania: Tanzania Drilling Project Sites 11 to 14. Journal of Nannoplankton Research. 28(1): 17-34. gs

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 ornatus 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=113 Go to Archive.is to create a permanent copy of this page - citation notes
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