Ericsonia orbis


Classification: ntax_cenozoic -> Coccolithales -> Coccolithaceae -> Ericsonia -> Ericsonia orbis
Sister taxa: E. monilis, E. subpertusa, E. media ⟩⟨ E. orbis, E. staerkeri, E. aliquanta, E. robusta, E. sp.

Taxonomy:

Citation: Ericsonia orbis Bown 2016
Rank: Species

Distinguishing features: small (<5μm), circular with relatively wide central area;

Farinacci & Howe catalog pages: E. orbis *


Morphology: Small (<5μm), circular Ericsonia coccoliths with a central area width similar to, or just slightly greater than, the rim width. Distinguished from E. robusta and E. aliquanta by its smaller size, and from E. subpertusa by its smaller size and relatively wider central area. Probably largely overlooked in previous work or considered to be small E. robusta. [Bown 2016]

Search data:
TagsLITHS: placolith, circular, CA: vacant,
CSPH: equant, monomorphic, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
MetricsLith size: 3->5µm;
Data source notes: lith size from OD
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP21 zone (32.92-34.44Ma, top in Rupelian stage). Data source: Bown 2016
First occurrence (base): within NP5 zone (59.54-61.51Ma, base in Selandian stage). Data source: Bown 2016

Plot of occurrence data:

References:

Bown, P. R. & Dunkley Jones, T. (2012). Calcareous nannofossils from the Paleogene equatorial Pacific (IODP Expedition 320 Sites U1331-1334). Journal of Nannoplankton Research. 32(2): 3-51. gs V O

Bown, P. R. (2010). Calcareous nannofossils from the Paleocene/Eocene Thermal Maximum interval of southern Tanzania (TDP Site 14). Journal of Nannoplankton Research. 31(1): 11-38. gs V O

Bown, P. R. (2016). Paleocene calcareous nannofossils from Tanzania (TDP sites 19, 27 and 38). Journal of Nannoplankton Research. 36(1): 1-32. gs V O

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Ericsonia orbis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 28-2-2021

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