Nannotax3 - ntax_cenozoic - Umbellosphaeraceae Nannotax3 - ntax_cenozoic - Umbellosphaeraceae


Classification: ntax_cenozoic -> Coccolith families inc sed -> Umbellosphaeraceae
Sister taxa: Alisphaeraceae, Papposphaeraceae, Umbellosphaeraceae, narrow rimmed placoliths, Coccolith genera inc sed, U. heterococcoliths

Daughter taxa (time control age-window is: 0-800Ma)Granddaughter taxa
Coccoliths trumpet-shaped
Umbellosphaera tenuis
Umbellosphaera irregularis
Umbellosphaera sp.


Citation: Umbellosphaeraceae Young et al., 2003
taxonomic rank: Family
Type species: Umbellosphaera tenuis
Taxonomic discussion: Kleijne (1993) described a sub-family, the Umbellosphaeroideae, within the Syracosphaeraceae, including Umbellosphaera and Gaarderia. With higher resolution SEM observations and better understanding of Syracosphaera coccolith morphology it became clear that Gaarderia corolla should be recombined into Syracosphaera, but that Umbellosphaera is not associated with the Syracosphaerales. For consistency of taxonomic usage, Young et al. (2003) raised the taxon Umbellosphaeroideae from sub-family to family status.

Distinguishing features:
Parent taxon (Coccolith families inc sed): 2N: Various heterococcolith groups not obviously related to the well-defined orders
N: mostly unknown

This taxon: Placolith-like with distal shield much larger than proximal, predominantly formed from R-units, V-units vestigial.

Farinacci & Howe catalog pages: Umbellosphaeraceae [no catalog entry yet]


Coccosphere dimorphic; coccoliths consist of a funnel-shaped distal part on a flat base. The funnel elements are continuous with the basal plate elements of the central area; a flange may be present around the basal plate, formed by a separate cycle of elements. Coccoliths are variable in size.

Search data:
Lith size: 1.5->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: Total of ranges of the species in this database
First occurrence (base): within NN15 zone (3.70-3.92Ma, base in Zanclean stage). Data source: Total of ranges of species in this database

Plot of occurrence data:


Kleijne, A. (1993b). Morphology, Taxonomy and distribution of extant coccolithophorids (Calcareous nannoplankton). PhD Thesis, Vrije Universiteit Amsterdam. 1-321. 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


Umbellosphaeraceae compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 25-2-2024

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

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