Helladosphaera vavilovii


Classification: ntax_cenozoic -> Holococcoliths -> bridged -> Helladosphaera -> Helladosphaera vavilovii
Sister taxa: H. cornifera, H. pienaarii, H. vavilovii, H. sp.

Taxonomy:

Citation: Helladosphaera vavilovii (Borsetti & Cati 1976) Young & Kleijne, in Young et al., 2003
Rank: Species
Basionym: Homozygosphaera vavilovii Borsetti & Cati 1976
Taxonomic discussion: The species was transferred to Helladosphaera by Young et al. (2003) since they showed that it was dimorphic

Distinguishing features: BCs like Homozygosphaera arethusae but bridge triangular in profile, terminated by ridge parallel to long axis of coccolith; open wall structure.
CFCs are well differentiated, helladoliths

Farinacci & Howe catalog pages: H. vavilovii *

Search data:
TagsLITHS: holococcolith, elliptical, hollow, CA: bar,
CSPH: tubular, elongated, CFC, CROSS-POLARS: R-prominent,
MetricsLith size: 1.2->1.8µm; Coccosphere size: 7->10µm;
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:

Borsetti, A. M. & Cati, F. (1976). Il Nannoplancton calcareo vivente nel Tirreno Centro-meridionale. Parte II. Giornale di Geologia. 40(1): 209-240. gs V O

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 V O


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Helladosphaera vavilovii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 13-4-2021

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=710 Go to Archive.is to create a permanent copy of this page - citation notes



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