Nannotax3 - ntax_cenozoic - Alisphaera extenta Nannotax3 - ntax_cenozoic - Alisphaera extenta

Alisphaera extenta


Classification: ntax_cenozoic -> Coccolith families inc sed -> Alisphaeraceae -> Alisphaera -> Alisphaera extenta
Sister taxa: A. capulata, A. memoria, A. ordinata, A. quadrilatera ⟩⟨ A. extenta, A. gaudii ⟩⟨ A. unicornis, A. spatula, A. bidentata, A. pinnigera, A. sp.

Taxonomy:

Citation: Alisphaera extenta Kleijne et al., 2002
taxonomic rank: Species
Synonyms:

Distinguishing features:
Parent taxon (Alisphaera): Coccoliths placolith-like, with asymmetrical distal flange
This taxon: Flange extended into pointed wing. In oblique and side views it can be seen that the wing flares upwards and ends in sub-vertical wall. Teeth absent.

Farinacci & Howe catalog pages: A. extenta *


Size:
Liths 1.1-2.3 µm long.

Search data:
LITHS: placolith, asymmetric, elliptical, CA: ca_conjunct, plate, vacant,
CSPH: equant, monomorphic, CROSS-POLARS: V-prominent, R-prominent,
Lith size: 1->2.5µm; Coccosphere size: 7->9µm; Liths per sphere: 70->90
Data source notes: lith size from Kleijne et al. 2002 and slightly extended; csph size from illustrated specs; csph data from Cros & Fortuño 2003; lith numbers from Yang & Wei 2003, range of estimates
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 Quaternary Period (0.00-2.59Ma, base in Gelasian 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

Giraudeau, J. & Bailey, G. W. (1995). Spatial dynamics of coccolithophore communities during an upwelling event in the Southern Benguela system. Continental Shelf Research. 15(1825-1852): -. gs

Kleijne, A., Jordan, R. W., Heimdal, B. R., Samtleben, C., Chamberlain, A. H. L. & Cros, L. (2002). Five new species of the coccolithophorid genus Alisphaera (Haptophyta) with notes on their distribution, coccolith structure and taxonomy. Phycologia. 40(6): 583-601. gs

Meier, K. J. S., Kinkel, H. & Young, J. R. (2014). A note on calcareous nannoplankton from the Kieler Förde (Baltic Sea). Journal of Nannoplankton Research. 33(1): 29-37. 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. S1: 1-132. gs


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Alisphaera extenta compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 1-3-2024

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=28 Go to Archive.is to create a permanent copy of this page - citation notes
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