Pseudoemiliania lacunosa

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

Distinguishing features: 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: Ellipsoplacolithus exsectus * Ellipsoplacolithus lacunosus * Salisia kamptneri *

Distinguishing features: 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.

Search data:
TagsLITHS: placolith, skeletal, circular, sub-circular, RIM: rim-narrow, slits, CA: grill, vacant,
CSPH: spherical, monomorphic, V-UNITS: none, R-UNITS: all, c-str, distal shield, prox shield, tube, DETAILS: ca_conjunct, isogyres kinked, isogyres oblique, rim-unicyclic,
MetricsLith size: 4->7µm;
The morphological data given here can be used on the advanced search page. See also these notes

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:

  • Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
  • Taxon plotted: Pseudoemiliania lacunosa, synonyms included - Ellipsoplacolithus lacunosus; Emiliania annula; Emiliania ovata; Pseudoemiliania lacunosa; Pseudoemiliania lacunosa (round); Pseudoemiliania lacunosa (small); Pseudoemiliania lacunosa C; Pseudoemiliania lacunosa E; Reticulofenestra lacunosa; Reticulofenestra lacunosa var. ovata; Pseudoemiliania lacunosa ovata; space-time plot :: Samples map :: Parent: Pseudoemiliania


    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. van, (1990). The ICBN: things you need to know -1. INA Newsletter 12/1, pp.19-20.

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

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


    Pseudoemiliania lacunosa compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 17-12-2018

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    Comments (1)

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    Page 1 of 1
    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
    Page 1 of 1

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