Nannotax3 - ntax_main - Pseudoemiliania ovata

Citation: Pseudoemiliania ovata (Bukry 1973) Young 1998

Basionym: Emiliania ovata * Bukry 1973

Taxonomic discussion: P. ovata and P. lacunosa intergrade, and many workers do not distinguish them. See Young (1990) for extended discussion of the relationship between lacunosa and ovata. There is continuous variation within the group and if it is thought useful to subdivide them further, then it would probably be most practical to simply do this by using size /shape classes without assigning names - as has been done by for instance Matsuoka & Okada (1989).
(De Kaenel et al. 1999 subdivided Pseudoemliania specimens by length at 4 and 6.5 µm)

Distinguishing features:
Parent taxon (Pseudoemiliania): With slits between some of the distal shield elements
This taxon: Elliptical and with <12 slits in the distal shield

Coccoliths similar to P. lacunosa but elliptical and with <12 slits in the distal shield.

Geological Range:
Notes: Very abundant in Late Pliocene
Last occurrence (top): within NN19 zone (0.44-1.93Ma, top in Ionian stage). Data source: Young 1998
First occurrence (base): within NN14 zone (3.92-4.13Ma, base in Zanclean stage). Data source: Young 1998

References:

Bukry, D. (1973c). Coccolith stratigraphy, eastern equatorial Pacific, Leg 16, Deep Sea Drilling Project. Initial Reports of the Deep Sea Drilling Project. 16: 653-711. gs O

de Kaenel, E., Siesser, W. G. & Murat, A. (1999). Pleistocene Calcareous Nannofossil Biostratigraphy and the Western Mediterranean Sapropels, Sites 974 to 977 and 979. Proceedings of the Ocean Drilling Program, Scientific Results. 161: 159-183. gs

Ghidalia, M. -J. (1988). Les Gephyrocapsaceae (Coccolithophoridées) des coupes de Stuni et de Vrica, Italie, stratotype de la limite Plio-Pléistocène. Étude systématique et intérêt stratigraphique. Cahiers de Micropaléontologie. 3(1): 5-49. gs O

Lourens, L. J., Hilgen, F. J., Shackleton, N. J., Laskar, J. & Wilson, D. (2004). The Neogene Period. In, Gradstein, F. M., Ogg, J. G. & Smith, A. (eds) A Geologic Time Scale. Cambridge University Press, Cambridge 409-440. gs

Matsuoka, H. & Okada, H. (1989). Quantitative analysis of Quaternary nannoplankton in the subtropical Northwestern Pacific Ocean. Marine Micropaleontology. 14: 97-118. gs

Nishida, S. (1979). Atlas of Pacific Nannoplanktons. News of Osaka Micropaleontologists, Special Paper. 3: 1-31. gs

Salomon, R. (1999). The Calcite Palace. Website - https://ina.tmsoc.org/galleries/CalcitePalace/index.htm. -. gs

Varol, O. (2004). Salisia n.g. – a new Pliocene-Pleistocene coccolith genus. Neues Jahrbuch für Geologie und Paläontologie, Monatshefte. 2004(2): 119-128. gs

Young, J. R. (1990). Size variation of Neogene Reticulofenestra coccoliths from Indian Ocean DSDP cores. Journal of Micropalaeontology. 9: 71-86. gs

Young, J. R. (1998). Neogene. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 225-265. gs

Pseudoemiliania ovata

References:

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