Palaeomicula quadrisphena

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


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

Farinacci & Howe catalog pages: Tetralithus quadrisphenus *

Search data:
TagsLITHS: nannolith-radiate, quadrate, star-shaped, CA: closed, T-UNITS: T-prominent,
MetricsLith size: 0->0┬Ám; Segments: 4->4;
Sources: 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:

  • (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Palaeomicula


    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 :: ::


    Palaeomicula quadrisphena compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 1-6-2020

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    Short stable page link: Go to to create a permanent copy of this page - citation notes

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