Nannotax3 - ntax_mesozoic - Manivitella fibrosa

Manivitella fibrosa


Classification: ntax_mesozoic -> Podorhabdales -> Tubodiscaceae -> Manivitella -> Manivitella fibrosa
Sister taxa: M. fibrosa, M. pemmatoidea, M. sp.


Taxonomy:

Citation: Manivitella fibrosa Kanungo et al. 2020
Rank: Species

Taxonomic discussion:
In XPL this species is darker than M. pemmatoidea and the distal shield is more finely striated. The outer edge of the inner cycle is not beaded in appearance, which makes the separation easier from M. pemmatoidea. This species does not have a clearly bicyclic appearance (in XPL) that is characteristic of the genus Tubodiscus (e.g., T. burnettiae), hence it is placed under the genus Manivitella. [Kanungo et al. 2020]

Farinacci & Howe catalog pages: M. fibrosa *


Morphology: Large, elliptical placolith with a narrow, striated rim and a broad, vacant central area. The rim is composed of two narrow shields that are dark in XPL and a third, very narrow and rather high collar-cycle which is bright in XPL. The distal shield has a highly striated appearance in XPL. Under PC, the rim appears as a dark band of uniform thickness. [Kanungo et al. 2020]

Size: Holotype L - 13.5 µm; Paratype L - 14.5 µm

Search data:
TagsLITHS: placolith, elliptical, CA: vacant, CROSS-POLARS: rim-bicyclic, rim-unicyclic, V-prominent,
MetricsLith size: 15->10µm;
Data source notes: Kanungo et al. 2020 - and range expanded
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within UC3 zone (94.54-96.16Ma, top in Cenomanian stage). Data source: Kanungo et al. 2020
First occurrence (base): at base of BC24 zone (2% up, 110Ma, in Albian stage). Data source: Kanungo et al. 2020

Plot of occurrence data:

References:

Kanungo, S., Bown, P. R. & Gale, A. S. (2020). Cretaceous (Albian-Turonian) calcareous nannofossil biostratigraphy of the onshore Cauvery Basin, southeastern India. Cretaceous Research. 118 [2021]: 1-22. gs


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Manivitella fibrosa compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 28-11-2021

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=11395 Go to Archive.is to create a permanent copy of this page - citation notes



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