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Olisthodiscales
''Olisthodiscus'' is a genus of heterokont algae. It is the only genus in the family Olisthodiscaceae, the order Olisthodiscales, and the class Olisthodiscophyceae. After a long history of controversial classifications, in 2021 it was recognized as a phylogenetically distinct lineage from the rest of ochrophyte classes. Taxonomy History of classification After its description in 1937, ''Olisthodiscus'' was placed in Xanthophyceae. In 1985, a study of the ultrastructure of a Japanese strain of ''Olisthodiscus'' concluded that it would be more appropriately placed in the Raphidophyceae. However, publications from 1980 to 1992 noted the differences between ''Olisthodiscus'' and other raphidophytes, since it lacked ejectile organelles and had a yellowish colour; additionally, it was observed that the flagellar root system was more similar to chrysophytes and brown algae than to raphidophytes. Despite the differences, a revision in 1992 did not accept these arguments and preferred to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dictyochophyceae
Dictyochophyceae sensu lato is a photosynthetic lineage of heterokont algae. Taxonomy * Class Dictyochophyceae Silva 1980 s.l. ** Subclass Sulcophycidae Cavalier-Smith 2013 *** Order Olisthodiscales Cavalier-Smith 2013 **** Family Olisthodiscaceae Cavalier-Smith 2013 *** Order Sulcochrysidales Cavalier-Smith 2013 **** Family Sulcochrysidaceae Cavalier-Smith 2013 ** Subclass Alophycidae Cavalier-Smith 2006 ictyochia Haeckel 1894 sensu Cavalier-Smith 1993*** Infraclass Pelagophycia Andersen & Saunders 1993 emend. 1995 stat. nov. elagophyceae Andersen & Saunders 1993**** Order Pelagomonadales Andersen & Saunders 1993 ***** Family Pelagomonadaceae Andersen & Saunders 1993 **** Order Sarcinochrysidales Gayral & Billard 1977 ***** Family Sarcinochrysidaceae Gayral & Billard 1977 *** Infraclass Actinochrysia Cavalier-Smith 1995 stat. nov. 2006 (Axodines Patterson, 1994; Actinochrysea Cavalier-Smith 1995; Actinochrysophyceae Cavalier-Smith 1995; Dictyochophyceae Silva 1980 emen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Olisthodiscus Luteus
''Olisthodiscus'' is a genus of heterokont algae. It is the only genus in the family Olisthodiscaceae, the order Olisthodiscales, and the class Olisthodiscophyceae. After a long history of controversial classifications, in 2021 it was recognized as a phylogenetically distinct lineage from the rest of ochrophyte classes. Taxonomy History of classification After its description in 1937, ''Olisthodiscus'' was placed in Xanthophyceae. In 1985, a study of the ultrastructure of a Japanese strain of ''Olisthodiscus'' concluded that it would be more appropriately placed in the Raphidophyceae. However, publications from 1980 to 1992 noted the differences between ''Olisthodiscus'' and other raphidophytes, since it lacked ejectile organelles and had a yellowish colour; additionally, it was observed that the flagellar root system was more similar to chrysophytes and brown algae than to raphidophytes. Despite the differences, a revision in 1992 did not accept these arguments and preferred ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Olisthodiscus Tomasii
''Olisthodiscus'' is a genus of heterokont algae. It is the only genus in the family Olisthodiscaceae, the order Olisthodiscales, and the class Olisthodiscophyceae. After a long history of controversial classifications, in 2021 it was recognized as a phylogenetically distinct lineage from the rest of ochrophyte classes. Taxonomy History of classification After its description in 1937, ''Olisthodiscus'' was placed in Xanthophyceae. In 1985, a study of the ultrastructure of a Japanese strain of ''Olisthodiscus'' concluded that it would be more appropriately placed in the Raphidophyceae. However, publications from 1980 to 1992 noted the differences between ''Olisthodiscus'' and other raphidophytes, since it lacked ejectile organelles and had a yellowish colour; additionally, it was observed that the flagellar root system was more similar to chrysophytes and brown algae than to raphidophytes. Despite the differences, a revision in 1992 did not accept these arguments and preferred ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ochrophyte
The ochrophytes, subphylum Ochrophytina, is a group of mostly photosynthetic heterokonts. Their plastid is of red algal origin. The classification of the group is still being worked out. Originally, the ochrophytes were regarded as a phylum denominated Ochrophyta. Some authors (e.g., Cavalier-Smith) divided it into two subphyla, Phaeista Cavalier-Smith 1995 (comprising Hypogyristea and Chrysista in some classifications, or Limnista and Marista in others) and Khakista Cavalier-Smith, 2000 (comprising ''Bolidomonas'' and diatoms). Others prefer not to use the subphyla, listing only lower taxa (e.g., Reviers, 2002, Guiry & Guiry, 2014). However, it is currently regarded as a subphylum inside of the phylum Gyrista, along with Pseudofungi and Bigyromonada. It contains two infraphyla: Diatomista, containing diatoms and related groups, and Chrysista, containing brown and golden algae and related groups. Phylogeny The cladogram below shows the evolutionary relationships betwe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Olisthodiscus Magnus
''Olisthodiscus'' is a genus of heterokont algae. It is the only genus in the family Olisthodiscaceae, the order Olisthodiscales, and the class Olisthodiscophyceae. After a long history of controversial classifications, in 2021 it was recognized as a phylogenetically distinct lineage from the rest of ochrophyte classes. Taxonomy History of classification After its description in 1937, ''Olisthodiscus'' was placed in Xanthophyceae. In 1985, a study of the ultrastructure of a Japanese strain of ''Olisthodiscus'' concluded that it would be more appropriately placed in the Raphidophyceae. However, publications from 1980 to 1992 noted the differences between ''Olisthodiscus'' and other raphidophytes, since it lacked ejectile organelles and had a yellowish colour; additionally, it was observed that the flagellar root system was more similar to chrysophytes and brown algae than to raphidophytes. Despite the differences, a revision in 1992 did not accept these arguments and preferred t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Olisthodiscus Carterae
''Olisthodiscus'' is a genus of heterokont algae. It is the only genus in the family Olisthodiscaceae, the order Olisthodiscales, and the class Olisthodiscophyceae. After a long history of controversial classifications, in 2021 it was recognized as a phylogenetically distinct lineage from the rest of ochrophyte classes. Taxonomy History of classification After its description in 1937, ''Olisthodiscus'' was placed in Xanthophyceae. In 1985, a study of the ultrastructure of a Japanese strain of ''Olisthodiscus'' concluded that it would be more appropriately placed in the Raphidophyceae. However, publications from 1980 to 1992 noted the differences between ''Olisthodiscus'' and other raphidophytes, since it lacked ejectile organelles and had a yellowish colour; additionally, it was observed that the flagellar root system was more similar to chrysophytes and brown algae than to raphidophytes. Despite the differences, a revision in 1992 did not accept these arguments and preferred t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypogyristea
The ochrophytes, subphylum Ochrophytina, is a group of mostly photosynthetic heterokonts. Their plastid is of red algal origin. The classification of the group is still being worked out. Originally, the ochrophytes were regarded as a phylum denominated Ochrophyta. Some authors (e.g., Cavalier-Smith) divided it into two subphyla, Phaeista Cavalier-Smith 1995 (comprising Hypogyristea and Chrysista in some classifications, or Limnista and Marista in others) and Khakista Cavalier-Smith, 2000 (comprising ''Bolidomonas'' and diatoms). Others prefer not to use the subphyla, listing only lower taxa (e.g., Reviers, 2002, Guiry & Guiry, 2014). However, it is currently regarded as a subphylum inside of the phylum Gyrista, along with Pseudofungi and Bigyromonada. It contains two infraphyla: Diatomista, containing diatoms and related groups, and Chrysista, containing brown and golden algae and related groups. Phylogeny The cladogram below shows the evolutionary relationships between al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ochrophyta
The ochrophytes, subphylum Ochrophytina, is a group of mostly photosynthetic heterokonts. Their plastid is of red algal origin. The classification of the group is still being worked out. Originally, the ochrophytes were regarded as a phylum denominated Ochrophyta. Some authors (e.g., Cavalier-Smith) divided it into two subphyla, Phaeista Cavalier-Smith 1995 (comprising Hypogyristea and Chrysista in some classifications, or Limnista and Marista in others) and Khakista Cavalier-Smith, 2000 (comprising '' Bolidomonas'' and diatoms). Others prefer not to use the subphyla, listing only lower taxa (e.g., Reviers, 2002, Guiry & Guiry, 2014). However, it is currently regarded as a subphylum inside of the phylum Gyrista, along with Pseudofungi and Bigyromonada. It contains two infraphyla: Diatomista, containing diatoms and related groups, and Chrysista, containing brown and golden algae and related groups. Phylogeny The cladogram below shows the evolutionary relationships between a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phaeophyceae
Brown algae (singular: alga), comprising the class Phaeophyceae, are a large group of multicellular algae, including many seaweeds located in colder waters within the Northern Hemisphere. Brown algae are the major seaweeds of the temperate and polar regions. They are dominant on rocky shores throughout cooler areas of the world. Most brown algae live in marine environments, where they play an important role both as food and as a potential habitat. For instance, ''Macrocystis'', a kelp of the order Laminariales, may reach in length and forms prominent underwater kelp forests. Kelp forests like these contain a high level of biodiversity. Another example is ''Sargassum'', which creates unique floating mats of seaweed in the tropical waters of the Sargasso Sea that serve as the habitats for many species. Many brown algae, such as members of the order Fucales, commonly grow along rocky seashores. Some members of the class, such as kelps, are used by humans as food. Between 1,500 and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pelagophyceae
Pelagophycidae is a subclass (biology), class of heterokont algae.It is the sister group of the axodines. Together, they form the class Dictyochophyceae. All known species are marine. They can be single-celled (Coccus, coccoid or flagellate), palmelloid or filamentous. Some members (''Pelagomonas'') belong to picoplankton, and some other (''Sarcinochrysis'') are macroscopic attached organisms. The subclass contains 13 genera, 3 families and 2 orders (2017): * Order Pelagomonadales Andersen & Saunders 1993 ** Family Pelagomonadaceae Andersen & Saunders 1993 *** genus ''Ankylochrysis'' Billard 1995 *** genus ''Aureococcus'' Hargraves & Sieburth 1988 *** genus ''Chrysophaeum'' Lewis & Bryan 1941 non Taylor 1951 *** genus ''Pelagococcus'' Norris 1977 *** genus ''Pelagomonas'' Andersen & Saunders 1993 * Order Sarcinochrysidales Gayral & Billard 1977 ** Family Chrysocystaceae Melkonian, Yoon & Andersen 2018 *** genus ''Chrysocystis'' Lobban, Honda & Chihara 1995 *** genus ''Chrysoreinh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eustigmatophyceae
Eustigmatophytes are a small group (17 genera; ~107 species) of eukaryotic forms of algae that includes marine, freshwater and soil-living species. All eustigmatophytes are unicellular, with coccoid cells and polysaccharide cell walls. Eustigmatophytes contain one or more yellow-green chloroplasts, which contain chlorophyll a and the accessory pigments violaxanthin and β-carotene. Eustigmatophyte zoids (gametes) possess a single or pair of flagella, originating from the apex of the cell. Unlike other heterokontophytes, eustigmatophyte zoids do not have typical photoreceptive organelles (or eyespots); instead an orange-red eyespot outside a chloroplast is located at the anterior end of the zoid. Ecologically, eustigmatophytes occur as photosynthetic autotrophs across a range of systems. Most eustigmatophyte genera live in freshwater or in soil, although ''Nannochloropsis'' contains marine species of picophytoplankton (2–4 μm). The class was erected to include some ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pinguiophyceae
Pinguiochrysidaceae is a family of marine Heterokontophyta. It is the only family in the order Pinguiochrysidales, which is the only order in the class Pinguiophyceae. It includes five species of unicellular organisms with high concentration of polyunsaturated fatty acids in the cytoplasm. The other common features are the lack of cell wall and the tendency for flagella loss even on the stage of zoospore, which is unusual for heterokonts. One species (''Polypodochrysis teissieri'') inhabits benthic substates (sometimes found the mucilage of other algae) and is able to produce lorica with one or more tubular necks. The other species live in the plankton. Species * Class Pinguiophyceae ** Order Pinguiochrysidales Kawachi et al., 2002 *** Family Pinguiochrysidaceae Kawachi et al., 2002 **** Genus '' Glossomastix'' O’Kelly, 2002 ***** Species ''Glossomastix chrysoplasta ''Glossomastix'' is a genus of heterokont Heterokonts are a group of protists (formally referred to as He ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
