Nannotax3 - ntax_cenozoic - Alisphaera gaudii Nannotax3 - ntax_cenozoic - Alisphaera gaudii

Alisphaera gaudii


Classification: ntax_cenozoic -> Coccolith families inc sed -> Alisphaeraceae -> Alisphaera -> Alisphaera gaudii
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 gaudii Kleijne et al., 2002
taxonomic rank: Species

Distinguishing features:
Parent taxon (Alisphaera): Coccoliths placolith-like, with asymmetrical distal flange
This taxon: Varimorhic, flange extended into a sharply pointed spur only in some specimens. Teeth well-developed.

Farinacci & Howe catalog pages: A. gaudii *


Size:
Liths 1.6-2.0 µm long.


Biology & life-cycles

The alternate life-cycle phase is Alisphaera gaudii POL, bsed on obervations of combination coccospheres with a previously undescribed Polycrater species by Cros & Fortuño (2002).

Search data:
LITHS: placolith, asymmetric, elliptical, CA: ca_conjunct, plate, vacant,
CSPH: equant, monomorphic, CROSS-POLARS: V-prominent, R-prominent,
Lith size: 1.5->2µm; Coccosphere size: 8->12µm; Liths per sphere: 70->160
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 inferred from single estimate
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:

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

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

Doan-Nhu, H. & Nguyen-Ngoc, L. (2021). On the genus Alisphaera (Alisphaeraceae, Haptophyta) including a new species A. memoria sp. nov. in the South China Sea. Nova Hedwigia. 113(3-4): 281-290. 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

Malinverno, E., Leoni , B. & Galli, P. (2022). Coccolithophore assemblages and a new species of Alisphaera from the Faafu Atoll, Maldives, Indian Ocean. Marine Micropaleontology. 172(102110): 1-16. gs

Okada, H. & McIntyre, A. (1977). Modern coccolithophores of the Pacific and North Atlantic Oceans. Micropaleontology. 23(1): 1-55. gs

Samtleben, C. et al. (1995). Plankton in the Norwegian-Greenland Sea: from living communities to sediment assemblages - an actualistic approach. Geologische Rundschau. 84: 108-136. gs

Yang, T. -N., Wei, K. & Wu, J. -T. (2012). Marine coccolithophores around Taiwan. Biodiversity Research Center, Academica Sinica, Taipei. 1-96. 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 gaudii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 26-5-2024

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