Nannotax3 - ntax_cenozoic - Toweius patellus Nannotax3 - ntax_cenozoic - Toweius patellus

Toweius patellus


Classification: ntax_cenozoic -> Isochrysidales -> Prinsiaceae -> Toweius -> Toweius patellus
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.

Taxonomy:

Citation: Toweius patellus Bown 2016
taxonomic rank: Species

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; broadly elliptical to sub-circular; central area broad, spanned by a plate with perforations too small to resolve in LM.

Farinacci & Howe catalog pages: T. patellus *


Morphology:

Medium sized, broadly elliptical to subcircular Toweius with relatively wide central area (width similar to or slightly greater than the rim) spanned by weakly birefringent plate; no obvious perforations are apparent in LM. [Bown 2016]
Distinguished from other Toweius species by the relatively wide central area spanned by a plate with no clearly visible perforations in LM. [Bown 2016]

Search data:
LITHS: placolith, elliptical, CA: ca_conjunct, grill, vacant,
CSPH: equant, monomorphic, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
Lith size: 5->8µm;
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP11 zone (53.70-54.17Ma, top in Ypresian stage). Data source: Bown 2016
First occurrence (base): within Np5 zone (59.54-61.51Ma, base in Selandian stage). Data source: Bown 2016

Plot of occurrence data:

References:

Bown, P. R. & Newsam, C. (2017). Calcareous nannofossils from the Eocene North Atlantic Ocean (IODP Expedition 342 Sites U1403–1411). Journal of Nannoplankton Research. 37(1): 25-60. gs O

Bown, P. R. (2016). Paleocene calcareous nannofossils from Tanzania (TDP sites 19, 27 and 38). Journal of Nannoplankton Research. 36(1): 1-32. gs O


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Toweius patellus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 16-7-2024

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=1419 Go to Archive.is to create a permanent copy of this page - citation notes
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