Nannotax3 - ntax_cenozoic - Umbellosphaera tenuis type I

Umbellosphaera tenuis type I

Classification: ntax_cenozoic -> Coccolith families inc sed -> Umbellosphaeraceae -> Umbellosphaera -> Umbellosphaera tenuis -> Umbellosphaera tenuis type I
Sister taxa: U. tenuis type I, U. tenuis type II, U. tenuis type IIIa, U. tenuis type IIIb, U. tenuis type IV, U. tenuis type O


Citation: Umbellosphaera tenuis type I sensu Kleijne 1993
Rank: type
Taxonomic discussion: A specimen illustrated by Norris (1971, fig.3) appears to show a grill in the central area, this is due to an Ophiaster coccolith having fallen onto it.

Distinguishing features:
Parent taxon (Umbellosphaera tenuis): Coccoliths convex outwards, relatively heavily calcified, with ridges on the distal surface.
This taxon: Coccoliths with distinct sutural ridges and numerous finer papillate secondary ridges

Farinacci & Howe catalog pages:



Ecology & Biogeography

Biology & life-cycles

Phylogenetic relations

Search data:
LITHS: placolith, asymmetric, elliptical, CA: ca_conjunct, plate, closed,
CSPH: equant, BC-dimorphic, CROSS-POLARS: rim-unicyclic, R-prominent,
Lith size: 0->0µm;
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]l

Plot of occurrence data:


Andruleit, H., Rogalla, U. & Staeger, S. (2005). Living coccolithophores recorded during the onset of upwelling conditions off Oman in the western Arabian Sea. Journal of Nannoplankton Research. 27(1): 1-14. gs V O

Kleijne, A. (1993b). Morphology, Taxonomy and distribution of extant coccolithophorids (Calcareous nannoplankton). Drukkerij FEBO B.V., Katwijk. 1-321. gs

Konno, S. & Jordan, R. W. (2006). Lagoon coccolithophorids from the Republic of Palau, NW Equatorial Pacific. Journal of Nannoplankton Research. 28(2): 95-110. gs O

Norris, R. E. (1971). Extant calcareous nannoplankton from the Indian Ocean. In, Farinacci, A. (ed.) Proceedings of the Second Planktonic Conference Roma 1970. E. J. Brill, Leiden 899-910. gs

Winter, A., Reiss, Z. & Luz, B. (1979). Distribution of living coccolithophore assemblages in the Gulf of Elat ('Aqaba). Marine Micropaleontology. 4: 197-223. 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


Umbellosphaera tenuis type I compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 5-12-2022

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