Nannotax3 - ntax_cenozoic - Micrantholithus excelsus

Micrantholithus excelsus


Classification: ntax_cenozoic -> Braarudosphaerales -> Braarudosphaeraceae -> Micrantholithus -> Micrantholithus excelsus
Sister taxa: M. breviradiatus, M. disculus, M. flos ⟩⟨ M. astrum, M. entaster, M. excelsus, M. hebecuspis, M. minimus, M. pinguis, M. vesper ⟩⟨ M. attenuatus, M. mirabilis ⟩⟨ M. angulosus, M. bramlettei, M. bulbosus, M. crenulatus, M. tinus, M. sp.

Taxonomy:

Citation: Micrantholithus excelsus Bown, 2005
Rank: Species

Distinguishing features:
Parent taxon (Micrantholithus): Pentaliths with sutures emerging through corners; edge often indented giving stellate outline
This taxon: Large, elevated Micrantholithus with deeply indented sides and gracile, long rays. The height of the pentalith results in a ragged LM appearance.

Farinacci & Howe catalog pages: M. excelsus *

Search data:
TagsLITHS: nannolith-radiate, pentagonal, star-shaped, CROSS-POLARS: T-prominent,
MetricsLith size: 9->18µm; Segments: 5->5; Liths per sphere: 12->12
Data source notes: lith size (diameter) from OD; lith numbers assumed from geometry
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP23 zone (29.62-32.02Ma, top in Rupelian stage). Data source: Bown 2005
First occurrence (base): within NP11 zone (53.70-54.17Ma, base in Ypresian stage). Data source: Bown 2005

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 V O

Dunkley Jones, T., Bown, P. R. & Pearson, P. (2009). Exceptionally well preserved upper Eocene to lower Oligocene calcareous nannofossils (Prymnesiophycidae) from the Pande Formation (Kilwa Group), Tanzania. Journal of Systematic Palaeontology. 7(4): 359-411. gs


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Micrantholithus excelsus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 25-9-2021

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=865 Go to Archive.is to create a permanent copy of this page - citation notes



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