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Pseudoscourfieldia Marina
''Pseudoscourfieldia'' is a genus of green algae in the family Pycnococcaceae. The genus name of ''Scourfieldia'' is in honour of David Joseph Scourfield Fellow of the Linnaean Society, FLS FRMS Imperial Service Order, ISO (1866–1949), who was a British civil servant and biologist known as an authority on the Cladocera. Species * ''Pseudoscourfieldia marina''(J.Throndsen) Manton, 1975 Also ''Pseudoscourfieldia longifilis'' now accepted as ''Nephroselmis pyriformis'' References External links Chlorophyta genera Pyramimonadophyceae {{green algae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus comes above species and below family (taxonomy), family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomy (biology), taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Green Algae
The green algae (singular: green alga) are a group consisting of the Prasinodermophyta and its unnamed sister which contains the Chlorophyta and Charophyta/Streptophyta. The land plants (Embryophytes) have emerged deep in the Charophyte alga as sister of the Zygnematophyceae. Since the realization that the Embryophytes emerged within the green algae, some authors are starting to properly include them. The completed clade that includes both green algae and embryophytes is monophyletic and is referred to as the clade Viridiplantae and as the kingdom Plantae. The green algae include unicellular and colonial flagellates, most with two flagella per cell, as well as various colonial, coccoid and filamentous forms, and macroscopic, multicellular seaweeds. There are about 22,000 species of green algae. Many species live most of their lives as single cells, while other species form coenobia (colonies), long filaments, or highly differentiated macroscopic seaweeds. A few other organi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pycnococcaceae
Pycnococcaceae is a family (biology), family of green algae in the order Pseudoscourfieldiales. The defining features of this family include the single invagination of the pyrenoid where the mitochondrial membrane fits into it Guillard ''et al.'' 1991 Pycnococcus provasolii, ''a coccoid prasinoxanthin containing phytoplankter from the Western North Atlantic and Gulf of Mexico.'' Journal of Phycology 27:39–47. and the "decapore" - a ring of 10 pores through the thick cell wall.Sieburth ''et al.'' 1999 ''Widespread occurrence of the oceanic ultraplankter'' Prasinococcus capsulatus ''(Prasinophyceae), the diagnostic "Golgi-Decapore complex" and the newly discovered polysaccharide "capsulan"'' References External links Green algae families Pyramimonadophyceae {{green algae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Center For Biotechnology Information
The National Center for Biotechnology Information (NCBI) is part of the United States National Library of Medicine (NLM), a branch of the National Institutes of Health (NIH). It is approved and funded by the government of the United States. The NCBI is located in Bethesda, Maryland, and was founded in 1988 through legislation sponsored by US Congressman Claude Pepper. The NCBI houses a series of databases relevant to biotechnology and biomedicine and is an important resource for bioinformatics tools and services. Major databases include GenBank for DNA sequences and PubMed, a bibliographic database for biomedical literature. Other databases include the NCBI Epigenomics database. All these databases are available online through the Entrez search engine. NCBI was directed by David Lipman, one of the original authors of the BLAST sequence alignment program and a widely respected figure in bioinformatics. GenBank NCBI had responsibility for making available the GenBank DNA seque ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
David Joseph Scourfield
David Joseph Scourfield FLS FRMS ISO (October 20, 1866 – October 3, 1949) was a British civil servant and biologist known as an authority on the Cladocera. He served as president of the Quekett Microscopical Club and vice president of the Royal Microscopical Society. Born in Bow, London, he was hired by the Royal Mint at age 20 and worked there until his retirement in 1926, when he was awarded the Imperial Service Order for his services. His scientific career primarily took place after retirement from civil service, publishing on fossil and living freshwater crustaceans. He died at his home in Leytonstone at the age of 83. He has been honoured in the names of two types of marine taxa, in 1912, botanist George Stephen West published ''Scourfieldia'', which is a genus of green algae in the family Scourfieldiaceae. Then in 1975, I.Manton published ''Pseudoscourfieldia ''Pseudoscourfieldia'' is a genus of green algae in the family Pycnococcaceae. The genus name of ''Scourfieldi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fellow Of The Linnaean Society
The Linnean Society of London is a learned society dedicated to the study and dissemination of information concerning natural history, evolution, and taxonomy. It possesses several important biological specimen, manuscript and literature collections, and publishes academic journals and books on plant and animal biology. The society also awards a number of prestigious medals and prizes. A product of the 18th-century enlightenment, the Society is the oldest extant biological society in the world and is historically important as the venue for the first public presentation of the theory of evolution by natural selection on 1 July 1858. The patron of the society was Queen Elizabeth II. Honorary members include: King Charles III of Great Britain, Emeritus Emperor Akihito of Japan, King Carl XVI Gustaf of Sweden (both of latter have active interests in natural history), and the eminent naturalist and broadcaster Sir David Attenborough. History Founding The Linnean Society wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Imperial Service Order
The Imperial Service Order was established by King Edward VII in August 1902. It was awarded on retirement to the administration and clerical staff of the Civil Service throughout the British Empire for long and meritorious service. Normally a person must have served for 25 years to become eligible, but this might be shortened to 16 years for those serving in unhealthy climates abroad. There is one class: Companion. Both men and women are eligible, and recipients of this order are entitled to use the post-nominal letters 'ISO'. History The new order was announced in the 1902 Coronation Honours list published on 26 June 1902, on the day scheduled for the Coronation of King Edward VII and Queen Alexandra. The coronation was postponed due to the King's illness, however, and the statutes of the order were published on 8 August 1902, to coincide with the actual coronation on the following day. The first list of recipients was included in the Birthday Honours list published on the Kingâ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cladocera
The Diplostraca or Cladocera, commonly known as water fleas, are a superorder of small crustaceans that feed on microscopic chunks of organic matter (excluding some predatory forms). Over 1000 species have been recognised so far, with many more undescribed. The oldest fossils of diplostracans date to the Jurassic, though their modern morphology suggests that they originated substantially earlier, during the Paleozoic. Some have also adapted to a life in the ocean, the only members of Branchiopoda to do so, even if several anostracans live in hypersaline lakes. Most are long, with a down-turned head with a single median compound eye, and a carapace covering the apparently unsegmented thorax and abdomen. Most species show cyclical parthenogenesis, where asexual reproduction is occasionally supplemented by sexual reproduction, which produces resting eggs that allow the species to survive harsh conditions and disperse to distant habitats. Description They are mostly long, with t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudoscourfieldia Marina
''Pseudoscourfieldia'' is a genus of green algae in the family Pycnococcaceae. The genus name of ''Scourfieldia'' is in honour of David Joseph Scourfield Fellow of the Linnaean Society, FLS FRMS Imperial Service Order, ISO (1866–1949), who was a British civil servant and biologist known as an authority on the Cladocera. Species * ''Pseudoscourfieldia marina''(J.Throndsen) Manton, 1975 Also ''Pseudoscourfieldia longifilis'' now accepted as ''Nephroselmis pyriformis'' References External links Chlorophyta genera Pyramimonadophyceae {{green algae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nephroselmis Pyriformis
''Nephroselmis'' is a genus of green algae. It has been placed in the family Nephroselmidaceae, although a 2009 study suggests that it should be separated into its own class, Nephroselmidophyceae. One species can be an endosymbiont of ''Hatena arenicola''. Morphology The cell body is right-left flattened. On the ventral side are two heterodynamic unequal flagella, the shorter beats towards the anterior direction while the long trails behind. ''Nephroselmis'' have a single cup-shaped chloroplast that contains an eyespot in its anterior-ventral edge below the short flagellum and a pyrenoid with starch plates. Vacuole is located in the left-anterior side, nucleus is located in the right-posterior side. The flagellar root system consists of a rhizoplast and three microtubular roots, one of which is multilayered. All the cells surface area is covered with layers of unminerallized scales, while the surface of the flagella has hairs as well. The cell body surface is covered by two to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chlorophyta Genera
Chlorophyta or Prasinophyta is a taxon of green algae informally called chlorophytes. The name is used in two very different senses, so care is needed to determine the use by a particular author. In older classification systems, it refers to a highly paraphyletic group of ''all'' the green algae within the green plants (Viridiplantae) and thus includes about 7,000 species of mostly aquatic photosynthetic eukaryotic organisms. In newer classifications, it refers to the sister clade of the streptophytes/ charophytes. The clade Streptophyta consists of the Charophyta in which the Embryophyta (land plants) emerged. In this latter sense the Chlorophyta includes only about 4,300 species. About 90% of all known species live in freshwater. Like the land plants (embryophytes: bryophytes and tracheophytes), green algae (chlorophytes and charophytes besides embryophytes) contain chlorophyll a and chlorophyll b and store food as starch in their plastids. With the exception of Palmophyll ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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