Distinguishing features: Reniform; central-area net with two to numerous pores
Daughter taxa (time control age-window is: 0-800Ma)![]() | Granddaughter taxa | ||||
Nephrolithus corystus Central area with 2-60 perforations each defined by rather irregular elongate crystals | |||||
Nephrolithus frequens Central area with 2-15 perforations each surrounded by neat rings of rhombic elements | |||||
Nephrolithus sp. Specimens not identified to species level |
Taxonomy:
Farinacci & Howe catalog pages: Nephrolithus + *
Distinguishing features: Reniform; central-area net with two to numerous pores
Search data:Tags | LITHS: placolith, asymmetric, CA: ca_disjunct, plate, pores, closed, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent, |
Metrics | Lith size: 4->16µm; 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): in upper part of Campanian Stage (59% up, 76.8Ma, in Campanian 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 Górka, H. (1957). Les Coccolithophoridés du Maestrichtien supérieur de Pologne. Acta Palaeontologica Polonica. 2: 239-284. gs V O Wind, F. H. & Wise, S. W. (1983). Correlation of upper Campanian-lower Maestrichtian calcareous nannofossil assemblages in drill and piston cores from the Falkland Plateau, southwest Atlantic Ocean. Initial Reports of the Deep Sea Drilling Project. 71: 551-563. gs V O Wind, F. H. (1983). The genus Nephrolithus Górka, 1957 (Coccolithophoridae). Journal of Paleontology. 57: 157-161. gsReferences:
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Nephrolithus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 28-2-2021
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