Markalius


Classification: Mesozoic -> Heterococcoliths inc sedis -> placoliths inc sedis -> Markalius
Sister taxa: Ellipsolithus, Haqius, Markalius, Prolatipatella, Repagulum,

Short diagnosis: Circular placoliths with moderately birefringent shields, a bright inner tube cycle and narrow or closed central areas.


Daughter taxa (blue => in age window 0-300Ma)
Markalius with closed central area.

Specimens not identified to species level

Taxonomy:

Citation: Markalius Bramlette & Martini, 1964
Rank: Genus
Type species: Markalius inversus (Deflandre in Deflandre and Fert, 1954) Bramlette and Martini, 1964 [Cyclococcolithus]

Farinacci & Howe catalog pages: Markalius + *

Short diagnosis: Circular placoliths with moderately birefringent shields, a bright inner tube cycle and narrow or closed central areas.

Geological Range:
Last occurrence (top): within Chattian Stage (23.03-28.09Ma, top in Chattian stage). Data source: Total of range of species in this database
First occurrence (base): within Valanginian Stage (133.88-139.39Ma, base in Valanginian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

Bramlette, M.N. & Martini, E., (1964). The great change in calcareous nannoplankton fossils between the Maestrichtian and Danian. Micropaleontology, 10(2): 291-322.

Burnett, J.A., (1998). Upper Cretaceous. In: Bown, P.R. (Editor), Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publications Series. Chapman & Hall, London, pp. 132-199.

Deflandre, G. & Fert, C., (1954). Observations sur les coccolithophoridés actuels et fossiles en microscopie ordinaire et électronique. Annales de Paléontologie, 40: 115-176.


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Markalius compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 22-2-2018

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Comments (1)

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fatemeh (Mashhad, Iran)

hi,

There isn't the species "Markalius circumradiatus" here.

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Jeremy Young (UK)

Hi, sorry for slow reply. The species is included in Haqius, so you can find it there. More generally you can use "search" to look for species and it in cases like these where the combination has changed it should send you in the right direction.

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