arrayname: original 
Nannotax3 - ntax_cenozoic - Blackites virgatus Nannotax3 - ntax_cenozoic - Blackites virgatus

Blackites virgatus


Classification: ntax_cenozoic -> Syracosphaerales -> Rhabdosphaeraceae -> Blackites -> B. inflatus group -> Blackites virgatus
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 virgatus Bown, 2005
Taxonomic rank: species
Taxonomic discussion: Blackites spines are often striated in distal parts but never as strongly or as completely as in this species.

Distinguishing features:
Parent taxon (B. inflatus group): Spine inflated with maximum width above base, many with conspicous bulge
This taxon: Large rhabdoliths with a tall hollow spine that is widest at its base, tapers to a point and is distinctively coarsely striated in XPL. The rim is broad and the outer cycle does not lie distally over the inner cycle. Screw-like in overall appearance.

Farinacci & Howe catalog pages: B. virgatus *

Search data:
LITHS: planolith, circular, elliptical, CA: ca_disjunct, grill, process,
Lith size: 15->18µm;
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. & 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


nannotaxlogo400px

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

Taxon Search:
Advanced Search

Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=135 Go to Archive.is to create a permanent copy of this page - citation notes
nannotaxlogo400px

Nannotax is being sponsored through 2024 by Woodside Energy and Shell USA


Add Comment

* Required information
Captcha Image

Comments

No comments yet. Be the first!