Nannotax3 - ntax_mesozoic - Palaeomicula quadrisphena

Palaeomicula quadrisphena


Classification: ntax_mesozoic -> Braarudosphaerales -> Polycyclolithaceae -> Palaeomicula -> Palaeomicula quadrisphena
Sister taxa: P. jacovidesii, P. maltica, P. quadrisphena


Taxonomy:

Citation: Palaeomicula quadrisphena (Worsley 1971) Varol & Jakubowski 1989
Rank: Species
Basionym: Tetralithus quadrisphenus (Worsley 1971)
Taxonomic discussion: Elements sub rectangular wedge-shaped, arranged in spiral

Farinacci & Howe catalog pages: T. quadrisphenus *


Morphology:


Size:

Search data:
LITHS: nannolith-radiate, quadrate, star-shaped, CA: closed, CROSS-POLARS: T-prominent,
Lith size: 0->0µm; Segments: 4->4;
Data source notes: no data avaialble
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within Valanginian Stage (133.88-139.39Ma, top in Valanginian stage). Data source: Worsley 1971
First occurrence (base): within Berriasian Stage (139.39-145.01Ma, base in Berriasian stage). Data source: Worsley 1971

Plot of occurrence data:

References:

Worsley, T. R. (1971). Calcareous nannofossil zonation of Upper Jurassic and Lower Cretaceous sediments from the Western Atlantic. In, Farinacci, A. (ed.) Proceedings of the Second Planktonic Conference Roma 1970. Edizioni Tecnoscienza, Rome 2: 1301-1321. gs O


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Palaeomicula quadrisphena compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 25-9-2022

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10850 Go to Archive.is to create a permanent copy of this page - citation notes



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