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

Alisphaera gaudii POL


Classification: ntax_cenozoic -> Coccolith families inc sed -> Alisphaeraceae -> Polycrater phase -> Alisphaera gaudii POL
Sister taxa: A. unicornis POL, A. gaudii POL, C. valliformis POL, P. sp. with lip-like borders, P. sp. minimum, P. sp. with slit, P. sp. ladle-like, P. sp. two petals modified two absent, P. sp.

Taxonomy:

Citation: Alisphaera gaudii Kleijne et al., 2002 POL
taxonomic rank: species
Taxonomic discussion: This is the alternate life-cycle phase of Alisphaera gaudii. It is distinctive but was not formally described prior to description of the heterococcolith phase.

Distinguishing features:
Parent taxon (Polycrater phase): Phase with quadrate, cup-like nannoliths
This taxon: Distal cup with two lenticular openings

Farinacci & Howe catalog pages:


Morphology:

Form with two lenticular openings on one half of distal surface of cone. NB The name is based on the similarity of the form to the architectural motifs of Gaudi.


Biology & life-cycles

This is the alternate life-cycle stage of Alisphaera gaudii, based on observation of combination coccospheres by Cros & Fortuño 2002

Search data:
LITHS: nannolith-radiate, quadrate, CA: ca_conjunct, pores, closed,
CSPH: equant, monomorphic, CROSS-POLARS: V-prominent,
Lith size: 0.6->0.9µm; Segments: 4->4; Coccosphere size: 5->11µm; Liths per sphere: 200->750
Data source notes: csph & lith length from Cros & Fortuño 2002 & 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 No known fossil record modern (0.00-0.00Ma, base in "Holocene" 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

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

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 POL compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 20-9-2024

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=30 Go to Archive.is to create a permanent copy of this page - citation notes
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