Micula staurophora


Ancestry: Mesozoic -> Nannoliths -> Polycyclolithaceae -> Micula -> Micula staurophora
Sister taxa: M. staurophora, M. adumbrata, M. concava, M. cubiformis, M. swastica, M. murus, M. prinsii, M. clypeata, M. praemurus, M. premolisilvae, M. sp.,

Short diagnosis: Typical form; cube-shaped; all 8 elements of similar size


Taxonomy:

Citation: Micula staurophora (Gardet, 1955) Stradner, 1963
Rank: Species
Basionym: Discoaster staurophorus Gardet, 1955
Synonyms: Micula decussata Vekshina, 1959
Notes & discussion: M. staurophora was described from reworked specimens in Eocene sediments. Many workers have prefered to use the name M. decussata since it was described from in situ Cretaceous specimens, however, M. staurophora clearly has priority.

Farinacci & Howe catalog pages: Discoaster staurophorus * Micula decussata *

Short diagnosis: Typical form; cube-shaped; all 8 elements of similar size

Geological Range:
Last occurrence (top): at top of Maastrichtian Stage (100% up, 66Ma, in Maastrichtian stage). Data source: Lees & Bown 2005 - consistently present to end Cret
First occurrence (base): at base of UC10 zone (0% up, 89.8Ma, in Coniacian stage). Data source: Burnett 1998 (zonal marker)

Plot of occurrence data:

References:

Burnett, J.A., (1998). Upper Cretaceous. In: Bown, P.R. (Editor), Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publications Series. Chapman & Hall, London, pp. 132-199.

Gardet, M., (1955). Contribution à l'étude des coccolithes des terrains néogènes de l'Algérie. Publications du Service de la Carte Géologique de l'Algérie (Nouvelle Série), 5: 477-550.

Stradner, H., (1963). New contributions to Mesozoic stratigraphy by means of nannofossils. Proceedings of the Sixth World Petroleum Congress, Section 1 Paper 4: 167-183.

Vekshina, V.N., (1959). Coccolithophoridae of the Maastrichtian deposits of the West Siberian lowlands. Siberian Science Research Institute of Geology Geophysics Mineralogy and Raw Materials, 2: 56-81.


Nannotax3 - Mesozoic - Micula staurophora by: Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 26-3-2017

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H K Sabot (AMD, India)
Dear Nannotax,

This is to appreciate your effort to make available your data in open forum. Thank you.
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