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Ascidiidae
Ascidiidae ("same-sac family") is a family of tunicates in the class Ascidiacea. Some species contain elevated amounts of vanadium. There are 4 genera: * ''Ascidia'' * ''Ascidiella'' * ''Phallusia'' * '' Psammascidia'' See also * Vanabins Vanabins (also known as vanadium-associated proteins or vanadium chromagen) are a group of vanadium-binding proteins. metalloproteins. Vanabins are found almost exclusively in the blood cells, or vanadocytes, of some tunicates (sea squirts), inclu ... References * Enterogona Tunicate families {{tunicata-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ascidia
''Ascidia'' is a genus of tunicate A tunicate is a marine invertebrate animal, a member of the subphylum Tunicata (). It is part of the Chordata, a phylum which includes all animals with dorsal nerve cords and notochords (including vertebrates). The subphylum was at one time ca ...s in the family Ascidiidae. Selected species * ''Ascidia achimotae'' Millar, 1953 * ''Ascidia adamanensis'' Oka, 1915 * ''Ascidia ahodori'' Oka, 1927 * ''Ascidia alisea'' Monniot & Monniot, 2006 * ''Ascidia alpha'' Tokioka, 1953 * ''Ascidia alterna'' Monniot & Monniot, 1991 * ''Ascidia archaia'' Sluiter, 1890 * ''Ascidia arenosa'' Hartmeyer, 1898 * ''Ascidia armata'' Hartmeyer, 1906 * ''Ascidia aspera'' Brunetti, 2007 * ''Ascidia austera'' Sluiter, 1904 * ''Ascidia aximensis'' Millar, 1953 * ''Ascidia azurea'' Monniot & Monniot, 1996 * ''Ascidia bathybia'' Hartmeyer, 1922 * ''Ascidia bifissa'' Sluiter, 1895 * ''Ascidia bocatorensis'' Bonnet & Rocha, 2011 * ''Ascidia caguayensis'' Millar & Goodbod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phallusia
''Phallusia'' is a genus of tunicates of the family ascidians, which includes the following species: *'' Phallusia aperta'' (Sluiter, 1904) *'' Phallusia arabica'' Savigny, 1816 *'' Phallusia barbarica'' Kott, 1985 *'' Phallusia colleta'' (C. Monniot & F. Monniot, 1970) *'' Phallusia depressiuscula'' (Heller, 1878) *'' Phallusia fragilis'' Bonnet & Rocha, 2011 *'' Phallusia fumigata'' (Grube, 1864) *'' Phallusia ingeria'' Traustedt, 1883 *'' Phallusia julinea'' Sluiter, 1915 *'' Phallusia koreana'' Traustedt, 1885 *'' Phallusia kottae'' (Monniot & Monniot, 1996) *''Phallusia mammillata ''Phallusia mammillata'' is a solitary marine tunicate of the ascidian class found in the eastern Atlantic Ocean and the Mediterranean Sea. Description ''Phallusia mammillata'' is a solitary species of ascidian and can grow to a height of abou ...'' (Cuvier, 1815) *'' Phallusia millari'' Kott, 1985 *'' Phallusia nigra'' Savigny, 1816 *'' Phallusia obesa'' (Herdman, 1880) *'' Phallusia philippi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phallusia Mammillata
''Phallusia mammillata'' is a solitary marine tunicate of the ascidian class found in the eastern Atlantic Ocean and the Mediterranean Sea. Description ''Phallusia mammillata'' is a solitary species of ascidian and can grow to a height of about . The tunic is a translucent, bluish-white colour and is covered with irregular rounded lobes or mounds. Distribution This tunicate is found on rocky, sandy or muddy substrates in the northeastern Atlantic Ocean, the North Sea, the English Channel and the Mediterranean Sea to depths of about . Biology Like all tunicates, ''Phallusia mammillata'' has a thick leathery tunic containing a cellulosic material. The tunic encloses a sac-shaped cavity with separate siphons through which water is drawn in and expelled. The animal feeds on the planktonic particles that it filters from the incoming seawater by passing it through a mucous net. ''P. mammillata'' is one of a small number of ascidians that accumulate the element vanadium in their blo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tunicate
A tunicate is a marine invertebrate animal, a member of the subphylum Tunicata (). It is part of the Chordata, a phylum which includes all animals with dorsal nerve cords and notochords (including vertebrates). The subphylum was at one time called Urochordata, and the term urochordates is still sometimes used for these animals. They are the only chordates that have lost their myomeric segmentation, with the possible exception of the 'seriation of the gill slits'. Some tunicates live as solitary individuals, but others replicate by budding and become colonies, each unit being known as a zooid. They are marine filter feeders with a water-filled, sac-like body structure and two tubular openings, known as siphons, through which they draw in and expel water. During their respiration and feeding, they take in water through the incurrent (or inhalant) siphon and expel the filtered water through the excurrent (or exhalant) siphon. Most adult tunicates are sessile, immobile and perman ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ascidiella
''Ascidiella'' is a genus of tunicates belonging to the family Ascidiidae. The genus has almost cosmopolitan distribution. Species: *''Ascidiella aspersa'' *''Ascidiella scabra'' *''Ascidiella senegalensis ''Ascidiella'' is a genus of tunicates belonging to the family Ascidiidae. The genus has almost cosmopolitan distribution. Species: *''Ascidiella aspersa'' *''Ascidiella scabra ''Ascidiella'' is a genus of tunicates belonging to the family A ...'' References {{Taxonbar, from=Q3624862 Enterogona Tunicate genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genera
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 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 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 of an ancestral taxon are grouped together (i.e. phylogenetic analysis should clearly demons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Family (biology)
Family ( la, familia, plural ') is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as the "walnut family". What belongs to a family—or if a described family should be recognized at all—are proposed and determined by practicing taxonomists. There are no hard rules for describing or recognizing a family, but in plants, they can be characterized on the basis of both vegetative and reproductive features of plant species. Taxonomists often take different positions about descriptions, and there may be no broad consensus across the scientific community for some time. The publishing of new data and opini ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Class (biology)
In biological classification, class ( la, classis) is a taxonomic rank, as well as a taxonomic unit, a taxon, in that rank. It is a group of related taxonomic orders. Other well-known ranks in descending order of size are life, domain, kingdom, phylum, order, family, genus, and species, with class fitting between phylum and order. History The class as a distinct rank of biological classification having its own distinctive name (and not just called a ''top-level genus'' ''(genus summum)'') was first introduced by the French botanist Joseph Pitton de Tournefort in his classification of plants that appeared in his ''Eléments de botanique'', 1694. Insofar as a general definition of a class is available, it has historically been conceived as embracing taxa that combine a distinct ''grade'' of organization—i.e. a 'level of complexity', measured in terms of how differentiated their organ systems are into distinct regions or sub-organs—with a distinct ''type'' of construction, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ascidiacea
Ascidiacea, commonly known as the ascidians, tunicates (in part), and sea squirts (in part), is a polyphyletic class in the subphylum Tunicata of sac-like marine invertebrate filter feeders. Ascidians are characterized by a tough outer "tunic" made of a polysaccharide. Ascidians are found all over the world, usually in shallow water with salinities over 2.5%. While members of the Thaliacea and Larvacea (Appendicularia) swim freely like plankton, sea squirts are sessile animals after their larval phase: they then remain firmly attached to their substratum, such as rocks and shells. There are 2,300 species of ascidians and three main types: solitary ascidians, social ascidians that form clumped communities by attaching at their bases, and compound ascidians that consist of many small individuals (each individual is called a zooid) forming colonies up to several meters in diameter. Sea squirts feed by taking in water through a tube, the oral siphon. The water enters the mouth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vanadium
Vanadium is a chemical element with the symbol V and atomic number 23. It is a hard, silvery-grey, malleable transition metal. The elemental metal is rarely found in nature, but once isolated artificially, the formation of an oxide layer ( passivation) somewhat stabilizes the free metal against further oxidation. Spanish scientist Andrés Manuel del Río discovered compounds of vanadium in 1801 in Mexico by analyzing a new lead-bearing mineral he called "brown lead". Though he initially presumed its qualities were due to the presence of a new element, he was later erroneously convinced by French chemist Hippolyte Victor Collet-Descotils that the element was just chromium. Then in 1830, Nils Gabriel Sefström generated chlorides of vanadium, thus proving there was a new element, and named it "vanadium" after the Scandinavian goddess of beauty and fertility, Vanadís (Freyja). The name was based on the wide range of colors found in vanadium compounds. Del Rio's lead mineral was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genera
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 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 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 of an ancestral taxon are grouped together (i.e. phylogenetic analysis should clearly demons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
