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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 198 ... [...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 198 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alophycidae
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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silicoflagellata
Dictyochales (Silicoflagellates, or Dictyochophyceae ''sensu stricto'') are a small group of unicellular heterokont algae, found in marine environments. Characteristics In one stage of their life cycle, they produce a siliceous skeleton, composed of a network of bars and spikes arranged to form an internal basket. These form a small component of marine sediments, and are known as microfossils from as far back as the early Cretaceous. Classification The algae in the Dictyochophyceae have been previously classified in the Chrysophyceae. There is one living genus, ''Dictyocha'', with two commonly recognised species. There are also several extinct genera, but their classification is difficult, since skeletons may show diverse forms within each living species. ''Dictyocha'' has one golden-brown chloroplast and a long flagellum extended into a wing-like shape. The skeleton-bearing stage is uninucleate, with many microtubule-supported projections, and there are also uninucleate a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dictyochales
Dictyochales (Silicoflagellates, or Dictyochophyceae ''sensu stricto'') are a small group of unicellular heterokont algae, found in marine environments. Characteristics In one stage of their life cycle, they produce a siliceous skeleton, composed of a network of bars and spikes arranged to form an internal basket. These form a small component of marine sediments, and are known as microfossils from as far back as the early Cretaceous. Classification The algae in the Dictyochophyceae have been previously classified in the Chrysophyceae. There is one living genus, ''Dictyocha'', with two commonly recognised species. There are also several extinct genera, but their classification is difficult, since skeletons may show diverse forms within each living species. ''Dictyocha'' has one golden-brown chloroplast and a long flagellum extended into a wing-like shape. The skeleton-bearing stage is uninucleate, with many microtubule-supported projections, and there are also uninucleate a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Florenciellales
Florenciellales is an order of 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 Olisthodis .... It includes '' Pseudochattonella'', '' Florenciella'', and '' Luteocerasus''. References Dictyochophyceae Heterokont orders {{Heterokont-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhizochromulinales
Rhizochromulinales is an order of Dictyochophyceae. The order includes the genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom ..., '' Rhizochromulina''. '' Ciliophrys'' is also sometimes included in this group. References Dictyochophyceae Heterokont orders {{Eukaryote-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pedinellales
Pedinellales is a group of single-celled algae found in both marine environments and freshwater. These are found in both freshwater and marine environments, and most genera are sessile, attached by posterior stalks. The flagellum is at the anterior of the cell, and the tentacles surround it, often capturing small prey drawn in by its current. The colored genera are '' Pedinella'', '' Apedinella'', '' Pseudopedinella'', and '' Mesopedinella''. Several more genera have lost their chloroplasts and feed entirely by phagocytosis. These are '' Parapedinella'', '' Actinomonas'', and '' Pteridomonas''. It also appears that certain heliozoa are actually derived pedinellids. ''Ciliophrys'' alternates between a mobile flagellate stage and a heliozoan feeding stage, where the body is contracted with extended axopods all over its surface, and the flagellum is curled up into a tight figure eight. The actinophryids, ''Actinophrys'' and ''Actinosphaerium'', exist only in a heliozoan form ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 are a primary component of plankton. Other notable members of the Stramenopiles include the (generally) parasitic oomycetes, including '' Phytophthora'', which caused the Great Famine of Ireland, and '' Pythium'', which causes seed rot and damping off. The name "heterokont" refers to the type of motile life cycle stage, in which the flagellated cells possess two differently arranged flagella (see zoospore). History In 1899, Alexander Luther created the term "Heterokontae" for some algae with unequal flagella, today called Xanthophyceae. Later, some authors (e.g., Copeland, 1956) included other groups in Heterokonta, expanding the name's sense. The term continues to be applied in different ways, leading to Heterokontophyta being appl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Actinochrysophyceae
The axodines are a group of unicellular stramenopiles that includes silicoflagellate and rhizochromulinid algae, actinomonad heterotrophic flagellates and actinophryid heliozoa. Alternative classifications treat the dictyochophytes as heterokont algae, or as Chrysophyceae. Other overlapping taxonomic concepts include the Actinochrysophyceae, Actinochrysea or Dictyochophyceae ''sensu lato''. The grouping was proposed on the basis of ultrastructural similarities, and is consistent with subsequent molecular comparisons. The Axodine grouping was unusual in breaking with the traditions of botanical and protozoological taxonomy to include the actinophryid heliozoa as part of the lineage that also contained the pedinellid algae along with colorless relatives such as ''Actinomonas'', Pteridomonas, and ''Ciliophrys''; the axodines further included the silicoflagellates, and Rhizochromulinales. This followed a growing consensus that the actinophryid heliozoa were not related to other type ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Axodine
The axodines are a group of unicellular stramenopiles that includes silicoflagellate and rhizochromulinid algae, actinomonad heterotrophic flagellates and actinophryid heliozoa. Alternative classifications treat the dictyochophytes as heterokont algae, or as Chrysophyceae. Other overlapping taxonomic concepts include the Actinochrysophyceae, Actinochrysea or Dictyochophyceae ''sensu lato''. The grouping was proposed on the basis of ultrastructural similarities, and is consistent with subsequent molecular comparisons. The Axodine grouping was unusual in breaking with the traditions of botanical and protozoological taxonomy to include the actinophryid heliozoa as part of the lineage that also contained the pedinellid algae along with colorless relatives such as ''Actinomonas'', Pteridomonas, and ''Ciliophrys''; the axodines further included the silicoflagellates, and Rhizochromulinales. This followed a growing consensus that the actinophryid heliozoa were not related to other type ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Olisthodiscaceae
''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] |
