Markalius


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

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


Daughter taxa: (blue => in age window 0-800Ma)
Markalius inversus
Markalius with closed central area.
Markalius vetulus
Medium sized (6-7.5 µm), tube cycle very bright  and individual elements not visible
Markalius sp.
Specimens not identified to species level

Taxonomy:

Citation: Markalius Bramlette & Martini, 1964
Rank: Genus
Type species: Cyclococcolithus leptoporus inversus Deflandre in Deflandre and Fert, 1954

Farinacci & Howe catalog pages: Markalius + *

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

Search data:
TagsLITHS: placolith, circular, CA: closed, V-UNITS: V-prominent, DETAILS: rim-unicyclic,
MetricsLith size: 6->9µm;
Sources: size range of included species
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): in lower part of Rupelian Stage (17% up, 32.9Ma, in Rupelian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Valanginian Stage (0% up, 139.4Ma, 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. gs

Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 132-199. gs

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

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Markalius compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 23-2-2020

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10630 Go to Archive.is to create a permanent copy of this page - citation notes
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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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