Nannotax3 - ntax_cenozoic - Biscutum braloweri Nannotax3 - ntax_cenozoic - Biscutum braloweri

Biscutum braloweri

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


Citation: Biscutum braloweri Gibbs & Bown in Bown et al. 2014
taxonomic rank: Species
Taxonomic discussion: In the printed version of the original publication the taxon name appeared incorrectly on the plate as Biscutum braloweria and Toweius braloweri

Distinguishing features:
Parent taxon (Biscutum): Elliptical placoliths with broad shields with or without a prominent inner tube cycle; the central-area may be imperforate or narrow and vacant or spanned by a simple structure (plate, cross or bar).
This taxon: Coccoliths medium-sized, central area closed or with narrow opening, coccospheres ovoid to ellipsoidal

Farinacci & Howe catalog pages: B. braloweri *


Coccosphere shape is distinctive, coccolith structure poorly established and possibly close to that of Prinsiaceae. Opening of central area often varies on single coccospheres.

Search data:
LITHS: placolith, elliptical, CA: closed,
CSPH: elongated, monomorphic, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
Lith size: 5->7µm; Coccosphere size: 15->20µm;
Data source notes: lith size from OD & extended slightly
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP10 zone (54.17-55.86Ma, top in Ypresian stage). Data source: Bown et al. 2014
First occurrence (base): within Late Paleocene Sub-Epoch (55.96-59.24Ma, base in Thanetian stage). Data source: Bown et al. 2014

Plot of occurrence data:


Bown, P. R., Gibbs, S. J., Sheward, R., O’Dea, S. & Higgins, D. (2014). Searching for cells: the potential of fossil coccospheres in coccolithophore research. Journal of Nannoplankton Research. 34(S): 5-21. gs


Biscutum braloweri compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 25-6-2024

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Short stable page link: Go to to create a permanent copy of this page - citation notes

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