arrayname: original
Taxonomy:
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:
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 |
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:
Varol, O. (1984). New Neogene calcareous nannofossil taxa from Malta and southern Turkey. Neues Jahrbuch für Geologie und Paläontologie, Monatshefte. 6: 375-384. gs References:
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Lithostromation biconvexitas compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 19-4-2025
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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