Gephyrocapsa oceanica


Classification: Coccolithophores -> Isochrysidales -> Noelaerhabdaceae -> Gephyrocapsa -> Gephyrocapsa oceanica
Sister taxa: G. oceanica, G. muellerae, G. ornata, G. ericsonii, G. sp elevated bridge, G. caribbeanica, G. omega, G. lumina, G. small, G. sp.,

Taxonomy:

Citation: Gephyrocapsa oceanica Kamptner, 1943
Rank: Species
Synonyms:
Notes & discussion: The name G. oceanica has been applied with different meanings in the fossil record. Some authors have applied the name to any large Gephyrocapsa coccoliths, others confine it to Late Quaternary forms closely similar to those of the modern species.

Distinguishing features: Large species of Gephyrocapsa; bridge at low to intermediate angle to short axis; central area usually wide.

Farinacci & Howe catalog pages: Gephyrocapsa oceanica * , Gephyrocapsa dentata * , Gephyrocapsa gracillima *


Morphology remarks: Inner tube often protrudes to form collar around central area. G. oceanica is usually easy to identify in the plankton, the only species it can readily be confused with is G. muellerae but this produces smaller coccoliths with the bridge at a higher angle (nearer the long axis) and a smaller central opening. However, intergrades with other species occur in the fossil record.

Size: Coccospheres, 6 to 10 µm; coccoliths, 3.5 to 6 µm long.

Ecology & Biogeography: Coccospheres often occur in clusters in the plankton. Predominantly a low latitude eutrophic species. More widespread in the Pacific Ocean than in the Atlantic Ocean.

Biology & life-cycles: The cytology and life-cycle of G. oceanica is virtually identical to that of E. huxleyi (Bendif & Young 2014)

Search data:
TagsLITHS: placolith, elliptical, CA: bridge, bridge-diagonal, grill,
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: 3.5->6µm; Coccosphere size: 6->10µm; Liths per sphere: 9->35
Sources: morphom data from Cros & Fortuño 2003 & illustrated specs
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): Extant Data source: present in the plankton (Young et al. 2003)
First occurrence (base): within NN19 zone (0.44-1.93Ma, base in Gelasian stage). Data source: [JRY rough estimate]

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
  • Note to users in China - the diagram may not plot unless you use a VPN since I use google services on the website. If this is a problem please contact me 谢谢.
  • Taxon plotted: Gephyrocapsa oceanica, synonyms included - Gephyrocapsa oceanica; Gephyrocapsa oceanica (3-4 microns); Gephyrocapsa oceanica (4-5.5 microns); Gephyrocapsa oceanica (>3 microns); Gephyrocapsa oceanica (>5 microns); Gephyrocapsa oceanica (>5.5 microns); Gephyrocapsa oceanica (>6 microns); Gephyrocapsa oceanica (Large; Diagonal bridge); Gephyrocapsa oceanica (large); Gephyrocapsa oceanica s.l.; space-time plot :: Samples map :: Parent: Gephyrocapsa

    References:

    Andruleit, H., Rogalla, U. & Staeger, S. (2005). Living coccolithophores recorded during the onset of upwelling conditions off Oman in the western Arabian Sea. Journal of Nannoplankton Research. 27(1): 1-14. gs

    Bendif, E. M. & Young, J. R. (2014). On the ultrastructure of Gephyrocapsa oceanica (Haptophyta) life stages. Cryptogamie, Algologie. 35(4): 379-388. gs

    Bollmann, J. (1997). Morphology and biogeography of Gephyrocapsa coccoliths in Holocene sediments. Marine Micropaleontology. 29: 319-350. gs

    Bréhéret, J. G. (1978). Formes nouvelles quaternaries et actualles de la famille des Gephyrocapsaceae (Cocolithophorides). Comptes Rendus Hebdomadaires des Séances de l'Académie des Sciences. Paris. Série D - Sciences Naturelles. 287: 447-449. gs

    Kamptner, E. (1943). Zur Revision der Coccolithineen-Spezies Pontosphaera huxleyi Lohm. Anzeiger der (Kaiserlichen) Akademie der Wissenschaften. Mathematische-Naturwissenschaftliche Klasse. Wien. 80: 73-49. gs

    Konno, S. & Jordan, R. W. (2006). Lagoon coccolithophorids from the Republic of Palau, NW Equatorial Pacific. Journal of Nannoplankton Research. 28(2): 95-110. gs

    Matsuoka, H. & Okada, H. (1990). Time-progressive morphometric changes of the genus Gephyrocapsa in the Quaternary sequence of the tropical Indian Ocean, Site 709. Proceedings of the Ocean Drilling Program. Scientific Results. 115: 255-270. gs

    Müller, C. (1974b). Calcareous nannoplankton, Leg 25 (Western Indian Ocean). Initial Reports of the Deep Sea Drilling Project. 25: 579-633. gs

    Samtleben, C. (1980). Die Evolution der Coccolithophoriden-Gattung Gephyrocapsa nach Befunden im Atlantik. Paläontologische Zeitschrift. 54: 91-127. gs

    Young, J. R., Geisen, M., Cros, L., Kleijne, A., Probert, I. & Ostergaard, J. B. (2003). A guide to extant coccolithophore taxonomy. Journal of Nannoplankton Research, Special Issue. 1: 1-132. gs


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    Gephyrocapsa oceanica compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 17-9-2019

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=613 Go to Archive.is to create a permanent copy of this page - citation notes



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