Distinguishing features: Elliptical to subrectangular; central-area with coarsely-perforate net.
Daughter taxa (time control age-window is: 0-800Ma)![]() | ||||
![]() | Cribrosphaerella circula Small (4-6µm), sub-circular, Cribrosphaerella species | |||
Cribrosphaerella daniae Large Cribrosphaerella species with narrow rim | ||||
![]() | Cribrosphaerella ehrenbergii Typical Cribrosphaerella species | |||
Cribrosphaerella pelta Cribrosphaerella with small central area | ||||
Cribrosphaerella santacruzensis Large oblong species of Cribrosphaerella with broad shield | ||||
Cribrosphaerella sp. Specimens not identified to species level |
Taxonomy:
Farinacci & Howe catalog pages: Cribrosphaerella + * , Cretadiscus * , Cribrosphaera * , Favocentrum *
Distinguishing features: Elliptical to subrectangular; central-area with coarsely-perforate net.
Morphology: Well-preserved specimens show three-shields (or tiers), the upper two shields are formed of V-units, and on overgrown species may fuse into one mass. The proximal shield is formed of R-units with the V-units appearing as a cycle of peg-like elements between the R-units.
Tags | LITHS: placolith, elliptical, CA: ca_disjunct, grill, plate, closed, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent, |
Metrics | Lith size: 4->12µm; 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): at base of Albian Stage (0% up, 113Ma, in Albian stage). Data source: Total of range of species in this database
Plot of occurrence data:
Arkhangelsky, A. D. (1912). Upper Cretaceous deposits of east European Russia. Materialien zur Geologie Russlands. 25: 1-631. gs Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 132-199. gs V O Gartner, S. (1968). Coccoliths and related calcareous nannofossils from Upper Cretaceous deposits of Texas and Arkansas. University of Kansas Paleontological Contributions, Articles. 48 (Protista 1): 1-56. gs V O Piveteau, J. (1952). Traité de Paléontologie. In, Grassé, P. P. (ed.) Traité de Zoologie. Anatomie, systématique, biologie, 1, part 1, Phylogenie. Protozoaires: généralités. Flagellés. Masson and Cie, Paris 107-115,. gsReferences:
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Cribrosphaerella compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 28-2-2021
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10309 Go to Archive.is to create a permanent copy of this page - citation notes |