Nannotax3 - ntax_cenozoic - Zygosphaera amoena

Zygosphaera amoena

Classification: ntax_cenozoic -> Holococcoliths -> flat-topped -> Zygosphaera -> Zygosphaera amoena
Sister taxa: S. bannockii HOL, Z. amoena, Z. marsilii, Z. sp.


Citation: Zygosphaera amoena Kamptner, 1937
Rank: Species
Synonyms: Zygosphaera debilis Kamptner, 1941 [the drawings of the coccoliths appear to have been reused between the two descriptions so it is not obvious why he redescribed the species - JRY 2015]

Distinguishing features:
Parent taxon (Zygosphaera): Dimorphic; liths semi-solid - formed of concentric rings of crystallites.
BCs flat topped with node or ridge on distal surface, rather than a true bridge.
CFCs similar with transverse bridge or leaf.

This taxon: BCs with longitudinal ridge or mound,

Farinacci & Howe catalog pages: Z. amoena * , Z. debilis *

Size: 1-1.5 µm long.

Search data:
TagsLITHS: holococcolith, elliptical, hollow, CA: closed,
CSPH: elongated, CFC, CROSS-POLARS: R-prominent,
MetricsLith size: 0.9->1.4µm; Coccosphere size: 5->7µm; Liths per sphere: 64->86
Data source notes: morphom data from Cros & Fortuño (2002) & Kleijne 1991
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:


Cros, L. & Fortuño, J. -M. (2002). Atlas of northwestern Mediterranean coccolithophores. Scientia Marina. 66: 1-186. gs V O

Kamptner, E. (1937b). Neue und bemerkenswerte Coccolithineen aus dem Mittelmeer. Archiv für Protistenkunde. 89: 279-316. 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 V O


Zygosphaera amoena compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 20-9-2021

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Short stable page link: Go to to create a permanent copy of this page - citation notes

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