Distinguishing features: Domed-shaped holococcoliths with holes or cavities.
Daughter taxa: (blue => in age window 0-800Ma) | ||||
Simialr to P. venata but with distinct base and lacking central core. | ||||
![]() | ![]() | Large, domed-shaped holococcoliths with holes or cavities. | ||
Specimens not identified to species level |
Taxonomy:
Farinacci & Howe catalog pages: Athenagalea * Petrobrasiella *
Distinguishing features: Domed-shaped holococcoliths with holes or cavities.
Geological Range:
Last occurrence (top): within Maastrichtian Stage (66.04-72.05Ma, top in Maastrichtian stage). Data source: Total of range of species in this database
First occurrence (base): within Santonian Stage (83.64-86.26Ma, base in Santonian stage). Data source: Total of range of species in this database
Plot of occurrence data:
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. Hattner, J.G. & Wise, S.W., (1980). Upper Cretaceous calcareous nannofossil biostratigraphy of South Carolina. South Carolina Geology, 24: 41-117. Troelsen, J. & Quadros, L.P., (1971). Distribuição bioestratigráfica dos nanofósseis em sedimentos marinhos (Aptiano-Mioceno) do Brasil. Anais da Academia Brasileira de Ciências, 43, 577-609: suplemento.
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Petrobrasiella compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 15-2-2019
Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10894 Go to Archive.is to create a permanent copy of this page - citation notes |