Markalius


Ancestry: Coccolithophores -> Mesozoic Survivors -> Markalius
Sister taxa: Biscutaceae, Chiastozygaceae, Markalius, Watznaueriaceae,

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


Daughter taxa (blue => in age window 0-300Ma)
Markalius with open central area.
Markalius with closed central area.
Markalius species with wide, but closed, central area
Markalius with very narrow tube cycle and closed central area.
Specimens which cannot be assigned to any established species

Taxonomy:

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

Farinacci & Howe catalog pages: Markalius + *

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


Size: All desribed species are of similar size - coccoliths 5-10 µm across.

Search data:
TagsLITHS: placolith, circular,
CSPH: spherical, monomorphic, V-UNITS: distal shield, R-UNITS: inner-tube, prox shield, DETAILS: rim-bicyclic,
MetricsLith size: 5->10┬Ám;
Sources:
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within Rupelian Stage (28.09-33.89Ma, top in Rupelian stage). Data source: Total of range of species in this database
First occurrence (base): within Campanian Stage (72.05-83.64Ma, base in Campanian 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.


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Markalius compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 26-9-2017

Taxon Search:
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AphiaID: 601803 Nomenclatural data on WoRMS
Go to Archive.is to create a permanent copy of this page - citation notes



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