Daughter taxa (time control age-window is: 0-800Ma) | ||||
Markalius apertus Markalius with open central area. | ||||
Markalius inversus Markalius with closed central area. | ||||
Markalius latus Markalius species with wide, but closed, central area | ||||
Markalius neuquenensis Like M.inversus but with a row of perforations on the tube | ||||
Markalius walvisensis Markalius with very narrow tube cycle and closed central area. | ||||
Markalius sp. Specimens which cannot be assigned to any established species |
Taxonomy:
Distinguishing features:
Parent taxon (Mesozoic Survivors): Mesozoic taxa which occur in low abundances in the early Palaeogene.
This taxon: Circular placoliths with moderately birefringent shields, bright inner tube cycle and narrow or closed central areas.
Farinacci & Howe catalog pages: Markalius + *
Size:
See also: Markalius - also occurs in the Mesozoic;
Search data:Lith size: 5->10µm; |
Geological Range:
Last occurrence (top): at top of NP21 zone (100% up, 32.9Ma, in Rupelian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within UC14 zone (80.97-82.79Ma, base in Campanian stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
Bown, P. R., Kim, H. & Gibbs, S. J. (2023). Danian calcareous nannofossil evolution and taxonomy with focus on sites from the North Atlantic Ocean (IODP Expedition 342, Sites U1403 and U1407). Journal of Nannoplankton Research. 41(2): 110-157. gs O Bramlette, M. N. & Martini, E. (1964). The great change in calcareous nannoplankton fossils between the Maestrichtian and Danian. Micropaleontology. 10(2): 291-322. gs Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 132-199. gs O Varol, O. (2023). New Paleocene calcareous nannofossils: Carlamuelleria, Davidbukrya, Mauriceblackia, Noelia and Senelia. Marine Micropaleontology. 180: 1-41. gsReferences:
Markalius compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 11-10-2024
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=838 Go to Archive.is to create a permanent copy of this page - citation notes |
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