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 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:
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 (80.97-81.43Ma, base in Campanian stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
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 OReferences:
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Markalius compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 11-12-2023
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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