arrayname: original
Taxonomy:
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 |
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:
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 OReferences:
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Blackites turritus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 16-3-2025
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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