Nannotax3 - ntax_cenozoic - Toweius serotinus Nannotax3 - ntax_cenozoic - Toweius serotinus

Toweius serotinus


Classification: ntax_cenozoic -> Isochrysidales -> Prinsiaceae -> Toweius -> Toweius serotinus
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 serotinus Bybell & Self-Trail, 1995
taxonomic rank: Species
Synonyms: Toweius serontinus Bybell & Self-Trail, 1995 - this form of the name - serontinus - is sometime seen, it appears to be a mis-spelling [my interpretation - JRY 2016]
Taxonomic discussion: The epithet serotinus means late-flowering and presumably refers to the fact that this is one of the last Toweius 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 (6-8 µm) with >=10 pores

Farinacci & Howe catalog pages: T. serotinus *


Morphology:

Larger form of Toweius (>6µm) with wide birefringent central area filled by robust grill defining numerous pores in the central rea (13-19 res according to Bybell & Self-Trail 1995, 10-20 according to Bown 2005).


Phylogenetic relations

Evolves from T. tovae within NP9, according to Bybell & Self-Trail (1995, p.11)

Most likely ancestor: Toweius tovae - at confidence level 3 (out of 5). Data source: Bybell & Self-Trail (1995, p.11).

Search data:
LITHS: placolith, elliptical, CA: ca_conjunct, grill, pores,
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 NP10 zone (54.17-55.86Ma, top in Ypresian stage). Data source: [PRB rough estimate]
First occurrence (base): within NP9 zone (55.86-57.21Ma, base in Thanetian stage). Data source: [PRB rough estimate]

Plot of occurrence data:

References:

Bown, P. R. (2005d). Palaeogene calcareous nannofossils from the Kilwa and Lindi areas of coastal Tanzania (Tanzania Drilling Project 2003-4). Journal of Nannoplankton Research. 27(1): 21-95. gs O

Bown, P. R. (2010). Calcareous nannofossils from the Paleocene/Eocene Thermal Maximum interval of southern Tanzania (TDP Site 14). Journal of Nannoplankton Research. 31(1): 11-38. gs O

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

Bybell, L. M. & Self-Trail, J. (1995). Evolutionary, biostratigraphic and taxonomic study of calcareous nanofossils from a continuous Palaeocene-Eocene boundary section in New Jersey. U.S. Geological Survey, Professional Paper. 1554: 1-36. gs O

Self-Trail, J. (2011). Paleogene Calcareous Nannofossils of the South Dover Bridge core, Southern Maryland (USA). Journal of Nannoplankton Research. 32(1): 1-28. gs

Self-Trail, J. M., Powars, D. S., Watkins, D. K. & Wandless, G. A. (2012). Calcareous nannofossil assemblage changes across the Paleocene–Eocene Thermal Maximum: Evidence from a shelf setting. Marine Micropaleontology. 92–93: 61-80. gs

Shepherd, C. L. & Kulhanek, D. K. (2016). Eocene nannofossil biostratigraphy of the mid-Waipara River section, Canterbury Basin, New Zealand. Journal of Nannoplankton Research. 36(1): 33-59. gs O


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Toweius serotinus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 3-3-2024

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=1424 Go to Archive.is to create a permanent copy of this page - citation notes
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