Nannotax3 - Coccolithophores

Markalius

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

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

Daughter taxa: (blue => in age window 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:

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 + *

Distinguishing features: 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:

Tags	LITHS: placolith, circular, CSPH: spherical, monomorphic, V-UNITS: distal shield, R-UNITS: inner-tube, prox shield, DETAILS: rim-bicyclic,
Metrics	Lith size: 5->10µm; Sources:

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 Campanian Stage (0% up, 83.6Ma, in Campanian stage). Data source: Total of range of species in this database

Plot of occurrence data:

Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
Neptune data: This is a higher taxon page so Neptune data is not plotted. See also: customisable plot Parent: Mesozoic Survivors

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

Markalius compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 17-6-2019

Taxon Search:

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Short stable page link: http://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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