Yellow-green algae
Scientific classification
Domain: Eukaryota Kingdom: Chromalveolata Phylum: Heterokontophyta Class: Xanthophyceae Allorge ex Fritsch

Yellow-green algae or xanthophytes are an important group of heterokont algae. Animals Plants fungi, and Protists are eukaryotes (juːˈkærɪɒt or -oʊt Organisms whose cells are organized into complex Chromalveolata is a Eukaryote supergroup first proposed by Thomas Cavalier-Smith as a refinement of his kingdom Chromista, which was first The heterokonts or stramenopiles are a major line of Eukaryotes presently containing about 10500 known species The heterokonts or stramenopiles are a major line of Eukaryotes presently containing about 10500 known species Most live in freshwater, but some are found in marine and soil habitats. They vary from single-celled flagellates to simple colonial and filamentous forms. Flagellates are cells with one or more whip-like organelles called flagella. Unlike other heterokonts, their chloroplasts do not contain fucoxanthin, which accounts for their lighter colour. Fucoxanthin is a Carotenoid, with formula C42H58O6 It is found as an accessory Pigment in the Chloroplasts of They appear to be the closest relatives of the brown algae. The Phaeophyceae or brown algae, (singular alga is a large group of mostly marine multicellular Algae including many Seaweeds of colder

Orders

The Xanthophyceae have been divided into the following four orders in some classification systems:

• Order Botrydiales
• Order Mischococcales
• Order Tribonematales Pascher
• Order Vaucheriales Nägeli ex Bohlin ^[1]

Recent ultrastructural and molecular phylogenetic DNA (nuclear and plastid) research shows that the Mischococcales might be paraphyletic, and the Tribonematales and Botrydiales polyphyletic, and suggests two orders at most be used until the relationships within the division are sorted ^[2]:

• Order Tribonematales
• Order Vaucheriales

References

1. ^ Christensen, T. 1987. Seaweeds of the British Isles. Voilume 4 Tribophyceae (Xanthophyceae). British Museum (Natural History), London ISBN 0 565 00980 X
2. ^ Sina M. Adl, Alastair G. B. Simpson, Mark A. Farmer, Robert A. Andersen, O. Roger Anderson, John R. Barta, Samuel S. Bowser, Guy Brugerolle, Robert A. Fensome, Suzanne Fredericq, Timothy Y. James, Sergei Karpov, Paul Kugrens, John Krug, Christopher E. Lane, Louise A. Lewis, Jean Lodge, Denis H. Lynn, David G. Mann, Richard M. Mccourt, Leonel Mendoza, Øjvind Moestrup, Sharon E. Mozley-Standridge, Thomas A. Nerad, Carol A. Shearer, Alexey V. Smirnov, Frederick W. Spiegel And Max F. J. R. Taylor, 2005. The New Higher Level Classification of Eukaryotes with Emphasis on the Taxonomy of Protists, J. Eukaryot. Microbiol. , 52(5), pp. 399–451.

See also

• Coccolithophore
• Cyanobacteria
• Brown Algae
• Diatom
• Golden Algae
• Green Algae
• Red Algae

Coccolithophores (also called coccolithophorids) are single-celled Algae, Protists and Phytoplankton belonging to the Division Cyanobacteria, also known as blue-green algae, blue-green bacteria or Cyanophyta, is a phylum of Bacteria that obtain their energy The Phaeophyceae or brown algae, (singular alga is a large group of mostly marine multicellular Algae including many Seaweeds of colder Diatoms ( Greek: (dia = "through" + (temnein = "to cut" i The golden algae or chrysophytes are a large group of Heterokont Algae found mostly in freshwater The green algae (singular green alga) are the large group of Algae from which the Embryophytes (higher plants emerged The red algae (Rhodophyta ˌroʊdəˈfaɪtə roʊˈdɒfɨtə from Greek: ῥόδον (rhodon = rose + φυτόν (phyton = plant thus red plant are

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