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Nannotax3 - ntax_cenozoic - Lithostromation biconvexitas Nannotax3 - ntax_cenozoic - Lithostromation biconvexitas

Lithostromation biconvexitas


Classification: ntax_cenozoic -> Nannolith families inc sed -> Lithostromationaceae -> Lithostromation -> Lithostromation biconvexitas
Sister taxa: L. hohnensis, L. pyramidale, T. tripartitus ⟩⟨ L. martinii, L. nodosum, L. obscurum, L. reginum ⟩⟨ L. operosum, L. perdurum, L. simplex, L. biconvexitas, L. sp.

Taxonomy:

Citation: Lithostromation biconvexitas Varol 1984
Taxonomic rank: species

Distinguishing features:
Parent taxon (Lithostromation): Triangular to stellate nannoliths with porous structure formed from small crystallites. All show 3-fold symetry but with a wide range of forms.
This taxon: Ellipsoidal central body with ends extended as spines

Farinacci & Howe catalog pages: L. biconvexitas *


Morphology:

The only bilaterally symettrical species

Search data:
LITHS: nannolith-radiate, star-shaped, CA: pores, CROSS-POLARS: V-prominent, 1ou,
Lith size: 10->15µm; Segments: 2->2;
Data source notes: lith size from OD and slightly extended
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NN7 zone (10.89-11.90Ma, top in Tortonian stage). Data source: Varol 1984
First occurrence (base): within NN6 zone (11.90-13.53Ma, base in Serravallian stage). Data source: Varol 1984

Plot of occurrence data:

References:

Varol, O. (1984). New Neogene calcareous nannofossil taxa from Malta and southern Turkey. Neues Jahrbuch für Geologie und Paläontologie, Monatshefte. 6: 375-384. gs


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Lithostromation biconvexitas compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 19-4-2025

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=821 Go to Archive.is to create a permanent copy of this page - citation notes
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