arrayname: original 
Nannotax3 - ntax_cenozoic - Blackites turritus Nannotax3 - ntax_cenozoic - Blackites turritus

Blackites turritus


Classification: ntax_cenozoic -> Syracosphaerales -> Rhabdosphaeraceae -> Blackites -> B. inflatus group -> Blackites turritus
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 turritus Bown, 2005
Taxonomic rank: species

Distinguishing features:
Parent taxon (B. inflatus group): Spine inflated with maximum width above base, many with conspicous bulge
This taxon: Rhabdolith with a tall spine constructed from at least two or three distinct structural/crystallographic units when viewed in XPL; there may be a small, terminal papilla. Typically the spine is taller than the width of the coccolith and near parallel-sided or slightly tapering before terminating quite sharply; it is usually about half the width 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. turritus *

Search data:
LITHS: planolith, elliptical, CA: ca_disjunct, grill, process,
Lith size: 4->6µm;
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 NP10 zone (54.17-55.86Ma, top in Ypresian stage). Data source: Bown 2005
First occurrence (base): within NP9 zone (55.86-57.21Ma, base in Thanetian 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

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 O


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Blackites turritus 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=134 Go to Archive.is to create a permanent copy of this page - citation notes
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