Distinguishing features: Small (3-4 µm), asymmetric rim; central area wide, largely filled by 4 plates.
Taxonomy:
Farinacci & Howe catalog pages: B. arrogans *
Distinguishing features: Small (3-4 µm), asymmetric rim; central area wide, largely filled by 4 plates.
Search data:Tags | LITHS: placolith, asymmetric, elliptical, CA: ca_disjunct, plate, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent, |
Metrics | Lith size: 3->4µm; Data source notes: illustrated specimens |
Geological Range:
Last occurrence (top): within Maastrichtian Stage (66.04-72.05Ma, top in Maastrichtian stage). Data source: Burnett 1998
First occurrence (base): within Maastrichtian Stage (66.04-72.05Ma, base in Maastrichtian stage). Data source: Burnett 1998
Plot of occurrence data:
Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 132-199. gs V O Perch-Nielsen, K. (1973c). Neue Coccolithen aus dem Maastrichtien von Danemark, Madagaskar und Agypten. Bulletin of the Geological Society of Denmark. 22: 306-333. gs V OReferences:
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Biscutum arrogans compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 27-1-2021
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