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Cryptomonadaceae
Cryptomonadaceae is a family of Cryptophyta in the order Cryptomonadales Cryptomonadales is an Order (biology), order of Cryptomonad, Cryptophyta containing the families Cryptomonadaceae and Hilleaceae. References Cryptomonads Bikont orders {{Cryptomonad-stub .... References External links * Cryptomonads Eukaryote families {{Cryptomonad-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptomonadales
Cryptomonadales is an Order (biology), order of Cryptomonad, Cryptophyta containing the families Cryptomonadaceae and Hilleaceae. References Cryptomonads Bikont orders {{Cryptomonad-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptophyceae
The cryptophyceae are a class of algae, most of which have plastids. About 220 species are known, and they are common in freshwater, and also occur in marine and brackish habitats. Each cell is around 10–50 μm in size and flattened in shape, with an anterior groove or pocket. At the edge of the pocket there are typically two slightly unequal flagella. Some exhibit mixotrophy. Characteristics Cryptophytes are distinguished by the presence of characteristic extrusomes called ejectosomes or ejectisomes, which consist of two connected spiral ribbons held under tension. If the cells are irritated either by mechanical, chemical or light stress, they discharge, propelling the cell in a zig-zag course away from the disturbance. Large ejectosomes, visible under the light microscope, are associated with the pocket; smaller ones occur underneath the periplast, the cryptophyte-specific cell surrounding. Except for ''Chilomonas'', which has leucoplasts, cryptophytes have one or two ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptaulax (cryptomonad)
''Cryptaulax'' was introduced by Skuja (Skuja, 1948). He considered it to be a type of cryptomonad. Subsequent studies suggest that it is euglenozoan. Because Skuja had clearly misidentified the flagellate as a cryptomonad, Vørs argued that at least some species should be placed in the genus ''Rhynchobodo''. This thinking was not adopted by Simpson. The genus had been erected by Skuja to accommodate ''Spiromonas akopus'', described by him in 1939.Skuja, H. 1939. Beitrage zur Algenflora Lettlands, 2. Acta Horti. Bot. Univ. Latviensis 11/12 The genus name ''Spiromonas'' had previously been applied to other organisms. This invalidates the name according to the rules of nomenclature, and requires a replacement name - hence ''Cryptaulax''. The similarity of the general morphology of ''C. akopus'' with other species that have been studied in more detail and deemed to be euglenozoan support the argument that the genus is euglenozoan. Species ''Cryptaulax akopos'' – ''Crypt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptomonas
''Cryptomonas'' is the name-giving genus of the Cryptomonads established by German biologist Christian Gottfried Ehrenberg in 1831. The algae are common in freshwater habitats and brackish water worldwide and often form blooms in greater depths of lakes. The cells are usually brownish or greenish in color and are characteristic of having a slit-like furrow at the anterior. They are not known to produce any toxins. They are used to feed small zooplankton, which is the food source for small fish in fish farms. Many species of ''Cryptomonas'' can only be identified by DNA sequencing. ''Cryptomonas'' can be found in several marine ecosystems in Australia and South Korea. Etymology ''Cryptomonas'' has the meaning of hidden small flagellates from “crypto” and “monas”. Genome Structure Species within ''Cryptomonas'' contain four genomes: the nuclear, the nucleomorph, the plastid, and mitochondrial genomes. The plastid genome contains 118 kilobase pairs and is a result of o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eukaryota
Eukaryotes () are organisms whose Cell (biology), cells have a cell nucleus, nucleus. All animals, plants, fungi, and many unicellular organisms, are Eukaryotes. They belong to the group of organisms Eukaryota or Eukarya, which is one of the Three-domain system, three domains of life. Bacteria and Archaea (both prokaryotes) make up the other two domains. The eukaryotes are usually now regarded as having emerged in the Archaea or as a sister of the Asgard (archaea), Asgard archaea. This implies that there are only Two-domain system, two domains of life, Bacteria and Archaea, with eukaryotes incorporated among archaea. Eukaryotes represent a small minority of the number of organisms, but, due to their generally much larger size, their collective global biomass (ecology), biomass is estimated to be about equal to that of prokaryotes. Eukaryotes emerged approximately 2.3–1.8 billion years ago, during the Proterozoic eon, likely as Flagellated cell, flagellated phagotrophs. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
