Daughter taxa (time control age-window is: 0-800Ma)![]() | ||||
Neococcolithes dubius Moderate to large with H-shaped cross bars. | ||||
Neococcolithes lososnensis Neococcolithes species with long central bar | ||||
Neococcolithes minutus Narrowly elliptical (with pointed ends), with cross bars forming an H-shape. | ||||
Neococcolithes nudus Narrowly elliptical with cross bars in narrow X-shape | ||||
Neococcolithes protenus Small to moderate with straight, diagonal, cross bars. | ||||
Neococcolithes purus Narrowly-elliptical with vacant central area | ||||
Neococcolithes radiatus Narrowly-elliptical, central area with numerous (18–22) radiating bars | ||||
![]() | Neococcolithes sp. Specimens which cannot be assigned to any established species |
Taxonomy:
Distinguishing features:
Parent taxon (Zygodiscaceae): Muroliths with rim formed from well-developed V- and variably developed R-units, with opposite imbrication directions, and central area structures that include disjunct transverse bars and diagonal crosses. R-units vestigial or not observed in several genera (Chiphragmalithus, Isthmolithus, Neococcolithes).
This taxon: Muroliths with diagonal to H-shaped cross bars. R-unit relict or absent and so LM image is unicyclic.
Farinacci & Howe catalog pages: Neococcolithes * , Heliorthus * , Zygolithus + + + * , Indumentalithus *
Morphology:
Size:
Ecology & Biogeography
Biology & life-cycles
Phylogenetic relations
See also: Nannotetrina - nannolith possibly formed by reduction of wall in Neococcolithes;
Search data:LITHS: murolith, elliptical, CA: ca_disjunct, diagonal cross, CROSS-POLARS: rim-unicyclic, V-prominent, |
Lith size: 5->10µm; |
Geological Range:
Last occurrence (top): near top of Priabonian Stage (86% up, 34.4Ma, in Priabonian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Danian Stage (0% up, 66Ma, in Danian stage). Data source: Total of range of species in this database
Plot of occurrence data:
Perch-Nielsen, K. (1985a). Cenozoic calcareous nannofossils. In, Bolli, H. M., Saunders, J. B. & Perch-Nielsen, K. (eds) Plankton Stratigraphy. Cambridge University Press, Cambridge 427-555. gs Sujkowski, Z. (1931). Étude pétrographique de Crétacé de Pologne. Sprawozdania Polskiego instytutu geologicznego. 6: 485-628. gsReferences:
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Neococcolithes compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 30-1-2023
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=921 Go to Archive.is to create a permanent copy of this page - citation notes |
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