Nannotax3 - ntax_cenozoic - Clathrolithus joidesa

Citation: Clathrolithus joidesa (Bukry & Bramlette, 1968) Bown, 2005

Basionym: Peritrachelina joidesa Bukry & Bramlette, 1968

Taxonomic discussion: C. joidesa and C. ellipticus appear to intergrade and were not separated by Bown (2010).

Distinguishing features:
Parent taxon (Clathrolithus): Unusual holococcoliths with non-coccolith morphology typically comprising an elliptical, concavo-convex, domed, perforate framework.
This taxon: C-shaped nannoliths only observed in side view. Similar in appearance to Clathrolithus ellipticus but lacking clear ridges and pores.

Geological Range:
Last occurrence (top): within NP23 zone (29.62-32.02Ma, top in Rupelian stage). Data source: [PRB rough estimate]
First occurrence (base): within NP19-20 zone (34.44-36.97Ma, base in Priabonian stage). Data source: [PRB rough estimate]

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 V 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 V 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 V O

Bukry, D. & Bramlette, M. N. (1968). Stratigraphic significance of two genera of Tertiary calcareous nannofossils. Tulane Studies in Geology and Paleontology. 6: 149-155. gs V O

de Kaenel, E. & Villa, G. (1996). Oligocene-Miocene calcareous nannofossil biostratigraphy and paleoeecology from the Iberian Abyssal Plain. Proceedings of the Ocean Drilling Program, Scientific Results. 149: 79-145. gs V O

Dunkley Jones, T., Bown, P. R. & Pearson, P. (2009). Exceptionally well preserved upper Eocene to lower Oligocene calcareous nannofossils (Prymnesiophycidae) from the Pande Formation (Kilwa Group), Tanzania. Journal of Systematic Palaeontology. 7(4): 359-411. gs

Tags	LITHS: holococcolith, asymmetric, horseshoe-shaped, CA: pores, CROSS-POLARS: 1ou, V-prominent,
Metrics	Lith size: 6->14µm; Data source notes: lith size from OD and illustrated specs

Clathrolithus joidesa

References:

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