Sphaerocalyptra quadridentata


Classification: Coccolithophores -> Holococcoliths -> tubeless -> Sphaerocalyptra -> Sphaerocalyptra quadridentata
Sister taxa: S. quadridentata, S. adenensis, S. dermitzakii, S. youngii, S. sp. 1, S. sp. 2, S. sp. 3, S. sp. 4, S. sp. 5, S. sp. 6, S. sp. Y, S. sp.

Taxonomy:

Citation: Sphaerocalyptra quadridentata (Schiller 1913) Deflandre, 1952
Rank: Species
Basionym: Calyptrosphaera quadridentata Schiller 1913
Synonyms:

Distinguishing features: BCs conical with basal flange

Farinacci & Howe catalog pages: C. quadridentata [no catalog entry yet], A. bidentula * , C. tholifera *


Morphology: BCs conical; with basal flange; walls show irregular perforate fabric; ca 1.8 µm long, 1.2 µm high.
CFCs similar but about 2µm high.


Biology & life-cycles: S. quadridentata has been shown to form combination coccospheres with Algirosphaera robusta by Kamptner (1941) Triantaphyllou & Dimiza (2003), and Dimiza et al. (2008). This evidence is quite clear, however, Cros & Fortuño (2002) illustrated two less conclusive combination coccospheres of S. quadridentata with Rhabdosphaera clavigera. This may be due to: (1) a very conservative holococcolith morphology, so that Rhabdosphaera clavigera and Aligrosphaera robusta produce very similar coccoliths; or (2) a complex life-cycle with two heterococcolith stages; or (3) that the R. clavigera combination coccospheres are artefacts. Given this ambiguity we prefer to retain the traditional name S. quadridentata until further evidence emerges.

See also: Algirosphaera robusta - likely heterococcolith phase;

Search data:
TagsLITHS: holococcolith, elliptical, cylindrical, hollow, CA: closed,
CSPH: equant, elongated, CFC,
MetricsLith size: 1.4->2.3µm; Coccosphere size: 5->8.5µm; Liths per sphere: 30->80
Data source notes: morphom data from Yang & Wei (2003), Cros & Fortuño (2002) & Kleijne 1991
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 No known fossil record modern (0.00-0.00Ma, base in stage). Data source: [JRY rough estimate]

Plot of occurrence data:

References:

Cros, L. & Fortuño, J. -M. (2002). Atlas of northwestern Mediterranean coccolithophores. Scientia Marina. 66: 1-186. gs V O

Deflandre, G. (1952). Classe des Coccolithophoridés. (Coccolithophoridae. Lohmann, 1902). In, Grassé, P. P. (ed.) Traité de Zoologie. Masson, Paris 439-470. gs

Dimiza, M. D., Triantaphyllou, M. & Theodoridis, S. (2005). Sphaerocalyptra dermitzakii and Sphaerocalyptra youngii, two new holococcolithophore species from the Aegean Sea (eastern Mediterranean). Journal of Nannoplankton Research. 27(2): 135-139. gs V O

Dimiza, M. D., Triantaphyllou, M. V. & Dermitzakis, M. D. (2008). Seasonality and ecology of living coccolithophores in Eastern Mediterranean coastal environments (Andros Island, Middle Aegean Sea). Micropaleontology. 54(2): 159-175. gs

Kamptner, E. (1941). Die Coccolithineen der Südwestküste von Istrien. Annalen des Naturhistorischen Museums in Wien. 51: 54-149. gs V O

Lecal-Schlauder, J. (1951). Recherches morphologiques et biologiques sur les Coccolithophorides Nord-Africains. Annales de l'Institut Océanographique, Monaco & Paris. 26: 255-362. gs

Schiller, J. (1913). Vorläufige Ergebnisse der Phytoplankton-Untersuchungen auf den Fahrten S.M.S. Najade in der Adria 1911/12. I. Die Coccolitophoriden. Sitzungberichte der Kaiserlichen Akademie der Wissenschaften, Mathematisch-Naturwissenschaftliche Klasse. 122(1): 597-617. gs V O

Triantaphyllou, M. & Dimiza, M. D. (2003). Verification of the Algirosphaera robusta - Sphaerocalyptra quadridentata (coccolithophores) life-cycle association. Journal of Micropalaeontology. 22(1): 107-111. gs V O

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 V O


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Sphaerocalyptra quadridentata compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 24-10-2020

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