Biscutum castrorum

Classification: Coccolithophores -> Mesozoic Survivors -> Biscutaceae -> Biscutum -> Biscutum castrorum
Sister taxa: B. braloweri, B. castrorum, B. harrisonii, B. neocoronum, B. sp.


Citation: Biscutum castrorum Black, in Black and Barnes, 1959
Rank: Species
Taxonomic discussion: B. castrorum is often regarded as a synonym of B. constans but has been more used in southern high latitudes literature.

Farinacci & Howe catalog pages: B. castrorum *

Search data:
TagsLITHS: placolith, elliptical, CA: closed,
CSPH: equant, elongated, monomorphic, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
MetricsLith size: 3->6µm;
Data source notes: lith size from illustrated specs
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Notes: Recorded as K/T survivor by Pospichal & Wise 1990
Last occurrence (top): within CP4 zone (59.54-61.51Ma, top in Selandian stage). Data source: Pospichal & Wise 1990
First occurrence (base): within Cretaceous Period (66.04-145.01Ma, base in Berriasian stage). Data source:

Plot of occurrence data:


Black, M. & Barnes, B. (1959). The structure of Coccoliths from the English Chalk. Geological Magazine. 96(5): 321-328. gs

Mai, H., von Salis, K., Willems, H. & Romein, A. J. T. (1997a). Fossil coccospheres from the K/T boundary section from Geulhemmerberg, The Netherlands. Micropaleontology. 43(281-302): -. gs

Pospichal, J. J. & Wise, S. W. (1990a). Calcareous nannofossils across the K/T boundary, ODP hole 690C, Maud Rise, Weddell Sea. Proceedings of the Ocean Drilling Program, Scientific Results. 113: 515-532. gs V O


Biscutum castrorum compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 25-11-2020

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