Pseudoemiliania lacunosa

Ancestry: Coccolithophores -> Isochrysidales -> Noelaerhabdaceae -> Pseudoemiliania -> Pseudoemiliania lacunosa
Sister taxa: P. lacunosa, P. ovata, P. sp.,

Short diagnosis: Circular to sub-circular with >12 slits, length >4µm


Citation: Pseudoemiliania lacunosa Kamptner, 1963 ex Gartner, 1969
Rank: Species
Notes & discussion: This species was invalid when originally described by Kamptner (1963), since he assigned it to a provisional genus - Ellipsoplacolithus. It was subsequently validated by Gartner (1969), when he assigned it to his new genus Pseudoemiliania. For an extended explanation of this see van Heck (1990).

Farinacci & Howe catalog pages: Coccolithites annulus * Ellipsoplacolithus exsectus * Ellipsoplacolithus lacunosus * Salisia kamptneri *

Short diagnosis: Circular to sub-circular with >12 slits, length >4µm

Morphology remarks: Coccoliths circular to sub-circular with >12 slits, length >4µm. Abundant in the Late Pliocene, but well-developed, large, circular forms only occur in the Pleistocene.

Geological Range:
Last occurrence (top): at top of NN19 zone (100% up, 0.4Ma, in Ionian stage). Data source: zonal marker, e.g. Young 1998
First occurrence (base): within NN15 zone (3.70-3.92Ma, base in Zanclean stage). Data source: Young 1998

Plot of occurrence data:


Bukry, D., (1971). Coccolith stratigraphy, Leg 7 DSDP. Initial Reports of the Deep Sea Drilling Project, 7: 1513-1518.

Cohen, C.L.D., (1964). Coccolithophorids from two Caribbean deep-sea cores. Micropaleontology, 10(2): 231-250.

Gartner, S., (1969). Correlation of Neogene planktonic foraminifera and calcareous nannofossil zones. Transactions of the Gulf Coast Association of Geological Societies, 19: 585-599.

Heck, S.E.v., (1990). On the validity of Pseudoemiliania lacunosa Kamptner 1963 ex Gartner 1967. Newsletter of the International Nannoplankton Association, 12(2): 11-12.

Kamptner, E., (1963). Coccolithineen-Skelettreste aus Tiefseeablagerungen des Pazifischen Ozeans. Annalen des Naturhistorischen Museums in Wien, 66: 139-204.

Varol, O., (2004). Salisia n.g. – a new Pliocene-Pleistocene coccolith genus. Neues Jahrbuch fuer Geologie und Palaontologie, Monatschefte, 2004(2): 119-128.

Young, J.R., (1998). Neogene. In: Bown, P.R. (Editor), Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publications Series. Chapman & Hall, London, pp. 225-265.

Nannotax3 - Coccolithophores - Pseudoemiliania lacunosa by: Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 28-4-2017

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Ines Galovic (CGS, Croatia)
In syn. you put in bracket (Coccolithus). Did you mean Coccolithites for Coccolithites annulus Cohen, 1964?
Jeremy Young (UCL, UK)
Thank you - you are quite correct and I have corrected the page now. Jeremy
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