arrayname: original
Taxonomy:
Distinguishing features:
Parent taxon (B. clavus group): Spine conical, tapering with maximum width near base
This taxon: Rhabdolith coccolith with a Blackites gladius-like rim and a relatively short, narrow, tapering, hollow spine that may incorporate a basal collar.
Farinacci & Howe catalog pages: B. spiculiformis *
Search data:
LITHS: planolith, circular, elliptical, CA: ca_disjunct, grill, process, |
Lith size: 5->8µm; Data source notes: lith size (spine height) from OD & slightly extended |
Geological Range:
Last occurrence (top): within NP15 zone (42.87-46.29Ma, top in Lutetian stage). Data source: Bown & Dunkley Jones, 2006
First occurrence (base): within NP15 zone (42.87-46.29Ma, base in Lutetian stage). Data source: Bown & Dunkley Jones, 2006
Plot of occurrence data:
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 Bybell, L. (1975). Middle Eocene calcareous nannofossils at Little Stave Creek, Alabama. Tulane Studies in Geology and Paleontology. 11(4): 177-247. gs O Jones, A. P. & Dunkley Jones, T. (2020). Middle Eocene to Early Oligocene calcareous nannofossils from the Nanggulan Formation, Java, Indonesia. Journal of Nannoplankton Research. 38(1): 57-79. gs References:
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Blackites spiculiformis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 25-3-2025
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=125 Go to Archive.is to create a permanent copy of this page - citation notes |
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