Nannotax3 - ntax_cenozoic - Alisphaera pinnigera Nannotax3 - ntax_cenozoic - Alisphaera pinnigera

Alisphaera pinnigera


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

Distinguishing features:
Parent taxon (Alisphaera): Coccoliths placolith-like, with asymmetrical distal flange
This taxon: Varimorphic, most coccoliths with no spine, a few with a sharp spike-like spine. Coccoliths also smaller and smoother than those of A. unicornis with narrower central area. Teeth variably developed

Farinacci & Howe catalog pages: A. pinnigera * , A. uncinata *


Morphology:

Described as dimorphic by Kleijne et al. (2002) but there is not really a sharp dichotomy between coccoliths with and without protrusions since coccoliths with very weak protrusions also occur. So it probably would be better to describe them as varimorphic. [my interpretation - JRY 2023]

Size:
Liths 1.3-2 µm

Search data:
LITHS: placolith, asymmetric, elliptical, CA: ca_conjunct, plate, vacant,
CSPH: equant, BC-dimorphic, CROSS-POLARS: V-prominent, R-prominent,
Lith size: 1.2->1.8µm; Coccosphere size: 7->11µm; Liths per sphere: 70->250
Data source notes: lith size from Kleijne et al. 2002 and slightly extended; 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 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

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 pinnigera compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 21-4-2024

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=32 Go to Archive.is to create a permanent copy of this page - citation notes
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