Nannotax3 - ntax_cenozoic - Bramletteius serraculoides

Citation: Bramletteius serraculoides Gartner, 1969

Synonyms: Sollasites tardus Roth, 1970 [these appear to be B. serraculoides bases - JRY 2015]

Variants: Bramletteius variabilis Roth, 1970 - separated on the grounds of having symetrical shaped spines without the typical facetted corners of B. serraculoides

Distinguishing features: Small Cruciplacolithus-like coccoliths with tall, thin, paddle-like processes.

Morphology: In well-preseved speciemns additional bars can be seen in the base forming a diamond-shaped ring around the axial cross. The species Sollasites tardus appears likely to have been described from isolated bases and so is included in the synonymy.

The process behaves as a single crystal unit in cross-polars with the c-axis oblique to the stem and approximately parallel to the elongation of the paddle.

Geological Range:
Last occurrence (top): within NP22 zone (32.02-32.92Ma, top in Rupelian stage). Data source: Perch-Nielsen 1985b
First occurrence (base): within NP15 zone (42.87-46.29Ma, base in Lutetian stage). Data source: Perch-Nielsen 1985

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. & Dunkley Jones, T. (2012). Calcareous nannofossils from the Paleogene equatorial Pacific (IODP Expedition 320 Sites U1331-1334). Journal of Nannoplankton Research. 32(2): 3-51. gs V O

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 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

Bybell, L. (1975). Middle Eocene calcareous nannofossils at Little Stave Creek, Alabama. Tulane Studies in Geology and Paleontology. 11(4): 177-247. 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

Gartner, S. (1969c). Two new calcareous nannofossils from the Gulf Coast Eocene. Micropaleontology. 15(1): 31-34. gs

Jones, A. P. & Dunkley Jones, T. (2020). Middle Eocene to Early Oligocene calcareous nannofossils from the Nanggulan Formation, Java, Indonesia. Journal of Nannoplankton Research. 30(1): 57-79. gs V O

Perch-Nielsen, K. (1985a). Cenozoic calcareous nannofossils. In, Bolli, H. M., Saunders, J. B. & Perch-Nielsen, K. (eds) Plankton Stratigraphy. Cambridge University Press, Cambridge 427-555. gs

Roth, P. H. (1970). Oligocene calcareous nannoplankton biostratigraphy. Eclogae Geologicae Helvetiae. 63: 799-881. gs V O

Shamrock, J. L. & Watkins, D. K. (2012). Eocene calcareous nannofossil biostratigraphy and community structure from Exmouth Plateau, Eastern Indian Ocean (ODP Site 762). Stratigraphy. 9(1): 1-11. gs

Tags	LITHS: placolith, elliptical, CA: concentric-ring(s), cross-axial, ca_disjunct, process, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
Metrics	Lith size: 1.5->5µm; Data source notes: size is lith length, paddle can be much longer

Bramletteius serraculoides

References:

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