Distinguishing features: Subcircular with very high rim; central-area narrow, with grill.
Daughter taxa (time control age-window is: 0-800Ma)![]() | ||||
![]() | ![]() | ![]() | Cribrocorona echinus One cycle regular, the other appears to be a hemispherical mass of spines | |
![]() | ![]() | Cribrocorona gallica Both cycles regular, grill in central area. | ||
Cribrocorona sp. Specimens not identified to species level. |
Taxonomy:
Farinacci & Howe catalog pages: Cribrocorona *
Distinguishing features: Subcircular with very high rim; central-area narrow, with grill.
Search data:Tags | LITHS: placolith, circular, cylindrical, hollow, CA: ca_disjunct, grill, vacant, closed, CROSS-POLARS: rim-unicyclic, R-prominent, |
Metrics | Lith size: 4->10µm; Data source notes: size range of included species |
Geological Range:
Last occurrence (top): at top of Maastrichtian Stage (100% up, 66Ma, in Maastrichtian stage). Data source: Total of range of species in this database
First occurrence (base): near base of Santonian Stage (5% up, 86.1Ma, 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. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 132-199. gs V O Perch-Nielsen, K. (1973c). Neue Coccolithen aus dem Maastrichtien von Danemark, Madagaskar und Agypten. Bulletin of the Geological Society of Denmark. 22: 306-333. gs V OReferences:
![]() |
Cribrocorona compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 25-2-2021
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10305 Go to Archive.is to create a permanent copy of this page - citation notes |