Nannotax3 - ntax_cenozoic - Toweius brusselensis Nannotax3 - ntax_cenozoic - Toweius brusselensis

Toweius brusselensis

Classification: ntax_cenozoic -> Isochrysidales -> Prinsiaceae -> Toweius -> Toweius brusselensis
Sister taxa: T. oztunalii ⟩⟨ T. occultatus, T. eminens, T. tovae, T. serotinus, T. pertusus ⟩⟨ T. reticulum, T. selandianus, T. rotundus, T. patellus, T. callosus, T. magnicrassus, T. brusselensis ⟩⟨ T. gammation ⟩⟨ T. sp.


Citation: Toweius brusselensis Steurbaut 2011
taxonomic rank: species
Basionym: Toweius brusselensis Steurbaut 2011
Taxonomic discussion: "...distinguished from all up to now described species [of Toweius] by its large, subrectangular to slightly rhombic central network reaching around 45% of the total placolith length, and consisting of around 60 small openings." [Steurbaut 2011]

Distinguishing features:
Parent taxon (Toweius): Typically medium-sized.(5-8 µm), elliptical to circular, central areas typically with a conjunct net and/or bars.
This taxon: Medium-sized (ca 6-8µm) central area wide & with angular edge.

Farinacci & Howe catalog pages: T. brusselensis *

Search data:
LITHS: placolith, elliptical, CA: ca_conjunct, grill, CROSS-POLARS: V-prominent, R-prominent,
Lith size: 6->8µm;
Data source notes: Original description, and slightly expanded size range
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP14 zone (46.29-49.11Ma, top in Lutetian stage). Data source:
First occurrence (base): within NP13 zone (49.11-50.50Ma, base in Ypresian stage). Data source:

Plot of occurrence data:


Steurbaut, E. & Nolf, D. (2021). The Mont-des-Récollets section (N France): a key site for the Ypresian-Lutetian transition at mid-latitudes – reassessment of the boundary criterion for the base-Lutetian GSSP. Geodiversitas. 43(11): 311-363. gs

Steurbaut, E. (2011). New calcareous nannofossil taxa from the Ypresian (Early Eocene) of the North Sea Basin and the Turan Platform in West Kazakhstan. Bulletin de l'Institut Royal des Sciences Naturelles de Belgique Sciences de la Terre. 81: 247-277. gs


Toweius brusselensis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 18-7-2024

Taxon Search:
Advanced Search

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

Nannotax is being sponsored through 2024 by Woodside Energy and Shell USA

Add Comment

* Required information
Captcha Image
Powered by Commentics


No comments yet. Be the first!