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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 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] |
Chattonella Marina
''Chattonella'' is a genus of marine raphidophytes associated with red tides. A technique using monoclonal antibodies can be used to identify the genus, while the RAPD reaction can be used to distinguish between different species within the genus. It includes the species ''Chattonella antiqua'', a bloom forming alga responsible for large scale fish deaths due to the synthesis of toxic compounds related to brevetoxin Brevetoxin (PbTx), or brevetoxins, are a suite of cyclic polyether compounds produced naturally by a species of dinoflagellate known as '' Karenia brevis''. Brevetoxins are neurotoxins that bind to voltage-gated sodium channels in nerve cells, le .... References Heterokont genera Ochrophyta {{Heterokont-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heterosigma Akashiwo
''Heterosigma akashiwo'' is a species of microscopic algae of the class Raphidophyceae. It is a swimming marine alga that episodically forms toxic surface aggregations known as harmful algal bloom. The species name ''akashiwo'' is from the Japanese for "red tide". Synonyms include ''Olisthodiscus luteus'' (Hulburt 1965), and ''Entomosigma akashiwo'' (Hada 1967). ''H. akashiwo'' and ''H. inlandica'' have been recognized as two species of ''Heterosigma''. However, Hara and Chihara (1987) described both specimens as one species, validly describing them as ''H. akashiwo''. Description ''H. akashiwo'' cells are relatively small, ranging in size from 18 to 34 μm in diameter. They appear golden brown, and appear in clusters. Morphology is highly variable, but does not appear to vary significantly between locations. One culture may contain flat or round individual cells. Molecular techniques for identification (including quantitative PCR) are preferred over traditional mic ... [...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] |
Chrysophyceae
The Chrysophyceae, usually called chrysophytes, chrysomonads, golden-brown algae or golden algae are a large group of algae, found mostly in freshwater. Golden algae is also commonly used to refer to a single species, ''Prymnesium parvum'', which causes fish kills. The Chrysophyceae should not be confused with the Chrysophyta, which is a more ambiguous taxon. Although "chrysophytes" is the anglicization of "Chrysophyta", it generally refers to the Chrysophyceae. Members Originally they were taken to include all such forms of the diatoms and multicellular brown algae, but since then they have been divided into several different groups (e.g., Haptophyceae, Synurophyceae) based on pigmentation and cell structure. Some heterotrophic flagellates as the bicosoecids and choanoflagellates were sometimes seen as related to golden algae too. They are now usually restricted to a core group of closely related forms, distinguished primarily by the structure of the flagella in motile c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Synchromophyceae
Picophagea, also known as Synchromophyceae, is a class of photosynthetic heterokont Heterokonts are a group of protists (formally referred to as Heterokonta, Heterokontae or Heterokontophyta). The group is a major line of eukaryotes. Most are algae, ranging from the giant multicellular kelp to the unicellular diatoms, which a ...s. The chloroplast of the Synchromophyceae are surrounded by two membranes and arranged in a way where they share the outer pair of membranes. The entire chloroplast complex is surrounded by an additional two outer membranes. Taxonomy According to AlgaeBase, the class contains only two genera: * Class Picophagea Synchromophyceae ** Order Synchromales Horn & Ehlers 2007 *** Family Synchromaceae Schnetter & Ehlers 2007 **** Genus '' Synchroma'' Schnetter 2007 ** Order Chlamydomyxales *** Family Chlamydomyxaceae **** Genus '' Chlamydomyxa'' Archer 1875 However, the latest revision recognizes an additional four genera: '' Chrysopodocystis'', ... [...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] |
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] |
