Pontosphaera multipora


Ancestry: Coccolithophores -> Zygodiscales -> Pontosphaeraceae -> Pontosphaera -> Pontosphaera multipora
Sister taxa: P. multipora, P. discopora, P. distincta, P. enormis, P. desuetoidea, P. geminipora, P. megapachydisca, P. veta, P. syracusana, P. alta, P. panarium, P. versa, P. wallacei, P. latoculata, P. formosa, > >>

Short diagnosis: Rim elevated, 3 or more cycles of large (0.3-0.5 µm) pores.


Taxonomy:

Citation: Pontosphaera multipora (Kamptner, 1948 ex Deflandre in Deflandre & Fert, 1954) Roth, 1970
Rank: Species
Basionym: Discolithus multiporus Kamptner, 1948 ex Deflandre, 1954
Variants: Coccolithites anisotrema Kamptner (1955) = Pontosphaera anisotrema (Kamptner 1956) Backman 1980 - outer cycle of large holes, several inner cycles of small holes
Synonyms: P. multipora is both a rather generalised morphotype - moderately developed rim, largish holes -and highly variable in coccolith morphology even on single coccospheres. So, it is unusually difficult to set the limits of the species and numerous similar species have been described.
Straightforward synonyms, from Miocene or younger:
Kamptner 1967 described several Discolithus species from a single Challenger dredging, all these fall broadly within the variation shown by modern P. multipora [JRY 2015]: Possible Paleogene synonyms
Notes & discussion: The coccoliths of P. multipora show considerable variation in number of pores and rim width even on single coccospheres.

Farinacci & Howe catalog pages: Coccolithites anisotrema * Discolithina confossa * Discolithina cribraria * Discolithina desueta * Discolithus apocresis * Discolithus distinctoides * Discolithus forenus * Discolithus giresus * Discolithus lineatus * Discolithus multiporus * Discolithus raclus * Discolithus radolensis * Discolithus redogenus * Discolithus rorsus * Discolithus sparsiforatus * Discolithus vescus * Discolithus vigintiforatus * Pontosphaera bukryi * Pontosphaera cribrosa * Pontosphaera grani * Pontosphaera indooceanica * Pontosphaera multipora * Pontosphaera rigida *

Short diagnosis: Rim elevated, 3 or more cycles of large (0.3-0.5 µm) pores.


Morphology remarks: Pores in outermost cycle usually elongated radially, inner cycles rather irregular; rim highly variable in width and may obscure outer pores

Geological Range:
Last occurrence (top): Extant Data source: present in the plankton (Young et al. 2003)
First occurrence (base): within Eocene Epoch (33.89-55.96Ma, base in Ypresian stage). Data source: [JRY rough estimate]

Plot of occurrence data:

References:

Aubry, M.-P., (1986). Palaeogene calcareous nannofossil biostratigraphy of northwestern Europe. Palaeogeography Palaeoclimatology Palaeoecology, 55: 267-334.

Backman, J., (1980). Miocene-Pliocene nannofossils and sedimentation rates in the Hatton-Rockall Basin, NE Atlantic Ocean. Stockholm Contributions in Geology, 36: 1-91.

Cepek, P., (1973). Die Art Pontosphaera indooceanica n. sp. und ihre Bedeutung für die Stratigraphie der jungsten Sedimente des Indischen Ozeans. Meteor Forschungsergebnisse Reihe D Biologie, ser C, 12: 1-8.

Deflandre, G. & Fert, C., (1954). Observations sur les coccolithophoridés actuels et fossiles en microscopie ordinaire et électronique. Annales de Paléontologie, 40: 115-176.

Gaarder, K.R., (1954). Coccolithineae, Silicoflagellatae, Pterospermataceae and other forms from the Michael Sars North Atlantic Deep Sea Expedition 1910. Report on the Scientific Results of the ‘‘Michael Sars’’ North Atlantic Deep Sea Expedition 1910, 2: 1-20.

Haq, B.U., (1971). Paleogene calcareous nannoflora. Parts I-IV. Stockholm Contributions in Geology, 25: 1-158.

Hay, W.W.; Mohler, H.P. & Wade, M.E., (1966). Calcareous nannofossils from Nal'chik (northwest Caucasus). Eclogae Geologicae Helvetiae, 59: 379-399.

Kamptner, E., (1948). Coccolithen aus dem Torton des Inneralpinen Wiener Beckens. Anzeiger. Österreichische Akademie der Wissenschaften. Mathematische-Naturwissenschafliche Klasse. Wien, 157: 1-16.

Kamptner, E., (1956). Zur Systematik und Nomenklatur der Coccolithineen. . Anz. Osterr. Akad. Wiss. Math.-Nat. Kl., 93: 4-11.

Kamptner, E., (1967). Kalkflagellaten - Skelettreste aus Tiefseeschlamm des Südatlantischen Ozeans. Annalen des Naturhistorischen Museums in Wien, 71: 117-198.

Müller 1970 Perch-Nielsen [sorry, not in our bibliography yet]

Müller, C.; Blanc Vernet, L.; Chamley, H. & Froget, C., (1974). Les coccolithophorides d’une carotte Méditerranéenne. Comparaison paléoclimatologique avec les foraminifères, les ptéropodes et les argiles. Tethys, 6(4): 805-828.

Perch-Nielsen, K., (1967). Nannofossilien aus dem Eozan von Danemark. Eclogae Geologicae Helvetiae, 60: 19-32.

Reinhardt, P., (1967). Fossile Coccolithen mit rhagoidem Zentralfeld (Fam. Ahmuellerellaceae, Subord. Coccolithineae). Neues Jahrbuch für Geologie und Paläontologie Monatshefte, 1967: 163-178.

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

Sullivan, F.R., (1965). Lower Tertiary nannoplankton from the California Coast Ranges. II. Eocene. University of California Publications in Geological Sciences, 53: 1-74.


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

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AphiaID: 619113 Nomenclatural data on WoRMS

Comments (1)

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Mike Styzen (Noble Energy, US)
I have seen a top for this species reported at around the base of NN 16. Is this based on the range of some sort of variant?
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Jeremy Young (NHM, UK)
good question - the name P. multipora seems to be used very broadly and I can well imagine that there are different forms with restricted ranges. In terms of taxonomy since Kamptner's type was from the Late Miocene there is no guarantee that the modern species is the same thing
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