= Chrysotila dentata
= Chrysotila placolithoides
= Chrysotila roscoffensis
= Chrysotila carterae
= Chrysotila scherffelii
Original descriptions of taxa. For coccolithophores, and many calcispheres, these are pages from the Farinacci & Howe Catalog of Calcareous Nannofossils. In other cases (e.g. non-calcifying haptophytes) the data is directly compiled on this site. The "Catalogue of Calcareous Nannofossils" was originally compiled by Prof A. Farinacci 1969-1989, since 2000 it has been updated and extended by Richard Howe - see The Farinacci and Howe Catalog - an Introduction.
Taxa are sorted alphabetically for simple browsing, or you can use search boxes at the top & bottom of the page
| Pleurochrysis carterae var. dentata Johansen et al. 1988 = Chrysotila dentata | ||||
| | | | Pleurochrysis placolithoides Fresnel & Billard, 1991 = Chrysotila placolithoides |
| | | | Pleurochrysis pseudoroscoffensis Gayral & Fresnel 1983 = Chrysotila roscoffensis |
| Pleurochrysis scherfellii Pringsheim 1955 = Chrysotila carterae | ||||
| | | | Pleurochrysis scherffelii Pringsheim 1955 = Chrysotila scherffelii |
Current identification/main database link: Chrysotila Anand 1936
Compiled data
Original Description
Brown algae, the cells of which divide in the mother envelope and form two- to multicellular, irregular, short, thread-like colonies. Usually two chromatophores in each cell. As reserve substances fat and chrysose. The swarmers have two long flagella and two chromatophores with pyrenoids. [translation from Google translate]
Etymology:
Editors' Notes
Pleurochrysis Pringsheim emend.
Coccolithophoracée à cycle digénétique composé d'une génération planctonique et d'une génération ben- thique pseudo-filamenteuse ou pseudo-parenchymateuse. La .génération planctonique est caractérisée par la pré- sence de cricolithes typiques des Cricosphaera. Les écailles sous-jacentes aux coccolithes sont circulaires, à marge épaissie et présentant, sur les deux faces, la même ornementation faite de stries radiales et d'un peloton fibrillaire lâche. Ecailles de l'haptonème plus petite, ovales. La génération benthique est composée de cellules renfermant un ou deux plastes pariétaux por- teurs d'un pyrénoïde proéminent; elles portent un revêtement fait de plusieurs couches d'écailles subcir- culaires, sans épaississement marginal, caractérisées par des stries radiales disposées en quatre secteurs sur l'une des faces et par des stries concentriques serrées sur l'autre face. Cette génération émet des zoïdes à deux fouets apicaux et haptonème, porteurs du même type d'écailles et dépourvus de coccolithes.
Pleurochrysis Pringsheim emend.
Coccolithophoracea with a digenetic cycle composed of a planktonic generation and a pseudo-filamentous or pseudo-parenchymal benthic generation. The planktonic generation is characterized by the presence of cricoliths typical of Cricosphaera. The scales underlying the coccoliths are circular, with a thickened margin and showing, on both sides, the same ornamentation made up of radial striations and a loose fibrillar platoon. Scales of the haptonema smaller, oval. The benthic generation is composed of cells containing one or two parietal plastids carrying a prominent pyrenoid; they have a coating made up of several layers of subcircular scales, without marginal thickening, characterized by radial ridges arranged in four sectors on one side and by tight concentric ridges on the other side. This generation emits zoids with two apical flagella and a haptonema, carrying the same type of scales and devoid of coccoliths.
Pringsheim, E. G. (1955). Kleine Mitteilungen über Flagellaten und Algen. I. Algenartige Chrysophyceen in Reinkultur. Archiv für Mikrobiologie. 21: 401-410. gsReferences:
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Pleurochrysis: Catalog entry compiled by Jeremy Young. Viewed: 8-2-2025
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=54378 Go to Archive.is to create a permanent copy of this page - citation notes |
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