Distinguishing features: Watznaueria-like in appearance but appear flat and have relatively large, visible rim elements.
Taxonomy:
Farinacci & Howe catalog pages: W. bayacki *
Distinguishing features: Watznaueria-like in appearance but appear flat and have relatively large, visible rim elements.
Morphology: May represent disaggregated, isolated shields of Watznaueria barnesiae.
Tags | LITHS: placolith, elliptical, CA: ca_conjunct, closed, CSPH: equant, monomorphic, CROSS-POLARS: rim-unicyclic, R-prominent, |
Metrics | Lith size: 5->8µm; Data source notes: guesstimate/medium-size coccolith |
Geological Range:
Last occurrence (top): within Hauterivian Stage (130.77-133.88Ma, top in Hauterivian stage). Data source: Original description
First occurrence (base): within Portlandian W. Europe-British Stage (144.10-147.93Ma, base in Tithonian stage). Data source: Original description
Plot of occurrence data:
Worsley, T. R. (1971). Calcareous nannofossil zonation of Upper Jurassic and Lower Cretaceous sediments from the Western Atlantic. In, Farinacci, A. (ed.) Proceedings of the Second Planktonic Conference Roma 1970. Edizioni Tecnoscienza, Rome 2: 1301-1321. gsReferences:
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Watznaueria bayackii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 18-1-2021
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