Alisphaera pinnigera


Classification: Coccolithophores -> Coccolith families inc sed -> Alisphaeraceae -> Alisphaera -> A. unicornis group -> Alisphaera pinnigera
Sister taxa: A. pinnigera, A. unicornis,

Taxonomy:

Citation: Alisphaera pinnigera Kleijne et al., 2002
Rank: Species
Variants:

Distinguishing features: Dimorphic, most coccoliths with no protrusion, a few with a sharp spike-like protrusion. Coccoliths also smaller and smoother than those of A. unicornis with narrower central area and well-developed teeth (but often hidden on the coccosphere by the overlapping flange of the adjacent coccolith).

Farinacci & Howe catalog pages: Alisphaera pinnigera * , Alisphaera uncinata *


Size: Liths 1.3-2 µm

Search data:
TagsLITHS: placolith, asymmetric, elliptical, RIM: spine(s), CA: axial-slit, plate,
CSPH: oblate (broad), ovoid, spherical, BC-dimorphic, varimorphic, polymorphic, V-UNITS: distal shield, R-UNITS: prox shield, px-plate, DETAILS: ca_conjunct,
MetricsLith size: 1.2->1.8µm; Coccosphere size: 7->11µm; Liths per sphere: 70->250
Sources: 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 stage). Data source: [JRY rough estimate]

Plot of occurrence data:

  • (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: A. unicornis group

    References:

    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, Special Issue. 1: 1-132. gs


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    Alisphaera pinnigera compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 22-11-2019

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    Short stable page link: http://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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