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Taxonomy:
Distinguishing features:
Parent taxon (B. morionum group): Spine low, globular, height<2x width
This taxon: Spine relatively short, wide, hollow sacculiform; may have a small terminal papilla.
The base is relatively broad, and typically the spine height and basal width are similar.
The spine broadens slightly before tapering to a point and is always slightly narrower than the base.
Farinacci & Howe catalog pages: C. morionum *
Search data:
LITHS: planolith, elliptical, CA: ca_disjunct, grill, process, |
Lith size: 4->8µm; Data source notes: lith size (spine height) from OD & illustrated specimens |
Geological Range:
Last occurrence (top): within NP14 zone (46.29-49.11Ma, top in Lutetian stage). Data source: [PRB rough estimate]
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 O Bramlette, M. N. & Sullivan, F. R. (1961). Coccolithophorids and related nannoplankton of the Early Tertiary in California. Micropaleontology. 7(2): 129-188. gs Deflandre, G. & Fert, C. (1954). Observations sur les coccolithophoridés actuels et fossiles en microscopie ordinaire et électronique. Annales de Paléontologie. 40: 115-176. gs Salomon, R. (1999). The Calcite Palace. Website - https://ina.tmsoc.org/galleries/CalcitePalace/index.htm. -. gs Self-Trail, J. (2011). Paleogene Calcareous Nannofossils of the South Dover Bridge core, Southern Maryland (USA). Journal of Nannoplankton Research. 32(1): 1-28. gs Shafik, S. (1989). Some new calcareous nannofossils from Upper Eocene and Lower Oligocene sediments in the Otway Basin, southeastern Australia. Alcheringa. 13: 69-83. gs Varol, O. (1989b). Eocene calcareous nannofossils from Sile (northwest Turkey). Revista Española de Micropaleontología. 21: 273-320. gs References:
Blackites morionum compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 26-1-2025
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=112 Go to Archive.is to create a permanent copy of this page - citation notes |
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