Nannotax3 - ntax_cenozoic

Chrysotila

Classification: ntax_cenozoic -> Coccolithales -> Pleurochrysidaceae -> Chrysotila
Sister taxa: Chrysotila

Daughter taxa (time control age-window is: 0-800Ma)
				Chrysotila carterae Typical form, liths 2-3 µm long; shields smooth
				Chrysotila dentata Ornate species with tooth-like projections forming an irregular collar around the tube.
				Chrysotila gayraliae Coccoliths 2-3 µm long, broadly elliptical; placolith-like, with broad flanges.
				Chrysotila la-hague Cocoliths elongate, with narrow flanges
				Chrysotila placolithoides Coccoliths with broad flanges; larger (2-4 µm long); distal shield nearly twice as wide as in any other Pleurochrysis species.
				Chrysotila roscoffensis Two cycles of nodes on tube inner wall and often one cycle of nodes on the distal shield.
				Chrysotila scherffelii Calcifying phase not known
				Chrysotila stipitata
				Chrysotila sp. Specimens which cannot be assigned to established species

Taxonomy:

Citation: Chrysotila Anand 1936

Rank: Genus

Type species: Chrysotila stipitata Anand 1936

Synonyms:

Cricosphaera Braarud 1960 (type species P. carterae)
Pleurochrysis Pringsheim, 1955 (type species Pleurochrysis scherfellii Pringsheim 1955 (which is a subjective junior synonym of P. carterae)

Taxonomic discussion: Change of generic name: Andersen et al. (2014) conclusively demonstrated that Chrysotila was a senior synonym of Pleurochrysis, although based on a phase of the life-cycle which does not produce coccoliths. Unfortunately this means the generic name has changed. This opinion has been followed by, for example, Algaebase and the Roscoff Culture Collection so we have also followed it here. [JRY 2017]

Distinguishing features: Coccoliths elliptical narrow-rimmed placoliths with complex rim structure, open central area

Farinacci & Howe catalog pages: Chrysotila, Pleurochrysis, Cricosphaera *

Morphology: Coccolithophore motile, neritic; coccosphere monomorphic.

Search data:

Tags	LITHS: placolith, elliptical, CA: vacant, CSPH: equant, monomorphic, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
Metrics	Lith size: 1.5->4µm;

The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): Extant Data source: Total of range of species in this database
First occurrence (base): at top of No known fossil record modern (100% up, 0Ma, in "Holocene" 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: Pleurochrysidaceae

References:

Anand, P. L. (1936). Seven new Chrysophyceae from the south-east coast of England. In, unknown (ed.) Twenty-third Indian Science Congress. Royal Asiatic Society of Bengal, Calcutta 282-283. gs

Andersen, R. A., Kim, J. I., Tittley, I. & Yoon, H. S. (2014). A re-investigation of Chrysotila (Prymnesiophyceae) using material collected from the type locality. Phycologia. 53(5): 463-473. gs

Braarud, T. (1960). On the coccolithophorid genus Cricosphaera n. gen. Nytt Magasin for Botanikk. 8: 211-212. gs

Pringsheim, E. G. (1955). Kleine Mitteilungen über Flagellaten und Algen. I. Algenartige Chrysophyceen in Reinkultur. Archiv für Mikrobiologie. 21: 401-410. gs

Chrysotila compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 1-3-2021

Taxon Search:

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=289 Go to Archive.is to create a permanent copy of this page - citation notes

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