Alisphaera extenta


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

Taxonomy:

Citation: Alisphaera extenta Kleijne et al., 2002
Rank: Species

Distinguishing features: Broad side of 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: Alisphaera extenta *


Size: Liths 1.1-2.3 µm long.

Search data:
TagsLITHS: placolith, asymmetric, elliptical, RIM: wing, CA: axial-slit, plate, vacant,
CSPH: oblate (broad), ovoid, spherical, equant, monomorphic, V-UNITS: distal shield, V-prominent, R-UNITS: prox shield, px-plate, R-prominent, DETAILS: ca_conjunct,
MetricsLith size: 1->2.5µm; Coccosphere size: 7->9µm; Liths per sphere: 70->90
Sources: 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:

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

    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

    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, Special Issue. 1: 1-132. gs


    nannotaxlogo400px

    Alisphaera extenta compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 10-4-2020

    Taxon Search:
    Advanced Search

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



    Comments (0)

    No comments yet on this page. Please do add comments if you spot any problems, or have information to share

    Add Comment

    * Required information
    1000
    Captcha Image
    Powered by Commentics