Distinguishing features: Like M. staurophora but with markedly concave faces
Taxonomy:
Farinacci & Howe catalog pages: Nannotetraster concavus *
Distinguishing features: Like M. staurophora but with markedly concave faces
Geological Range:
Last occurrence (top): within Maastrichtian Stage (66.04-72.05Ma, top in Maastrichtian stage). Data source: Burnett 1998
First occurrence (base): in lower part of UC11c subzone (40% up, 86.1Ma, in Coniacian stage). Data source: Burnett 1998, fig 6.4
Plot of occurrence data:
Bukry, D. (1969). Upper Cretaceous coccoliths from Texas and Europe. The University of Kansas Paleontological Contributions. Article 51 (Protista 2): 1-79. gs Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 132-199. gs Martini, E. & Stradner, H. (1960). Nannotetraster, eine stratigraphisch bedeutsame neue Discoasteridengattung. Erdoel-Zeitschrift. 76(8): 266-270. gs Stradner, H., Aubry, M. -P. & Bonnemaison, M. (2010). Calcareous nannofossil type specimens in the collection of the Geological Survey of Austria: A taxonomic and stratigraphic update. Jahrbuch der Geologischen Bundesanstalt. 150(1-2): 9-84. gs Thibault, N. (2010). Calcareous nannofossils from the boreal Upper Campanian- Maastrichtian chalk of Denmark. Journal of Nannoplankton Research. 30(1): 39-56. gs Verbeek, J. W. (1976b). Upper Cretaceous nannoplankton zonation in a composite section near El Kef, Tunisia. Proceedings of the Koninklijke Nederlandse Akademie van Wetenschappen. B79: 129-148. gsReferences:
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Micula concava compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 11-12-2019
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