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Walkeria Atlantica
''Walkeria'' is a genus of colonial bryozoans in the order Ctenostomatida. Species The World Register of Marine Species includes the following species in the genus: *'' Walkeria atlantica'' (Busk, 1886) *''Walkeria prorepens ''Walkeria'' is a genus of colonial bryozoans in the order Ctenostomatida. Species The World Register of Marine Species includes the following species in the genus: *'' Walkeria atlantica'' (Busk, 1886) *'' Walkeria prorepens'' Kubanin, 1 ...'' Kubanin, 1992 *'' Walkeria tuberosa'' Heller, 1867 *'' Walkeria uva'' (Linnaeus, 1758) References Ctenostomatida Bryozoan genera Taxa named by John Fleming (naturalist) {{Bryozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Fleming (naturalist)
John Fleming FRSE FRS FSA (10 January 1785 – 18 November 1857) was a Scottish Free Church minister, naturalist, zoologist and geologist. He named and described a number of species of molluscs. During his life he tried to reconcile theology with science. Fleming Fjord in Greenland was named after him. Life He was born on Kirkroads Farm near Bathgate in Linlithgowshire, the son of Alexander Fleming and his wife Catherine Nimmo. After studying divinity at the University of Edinburgh he graduated in 1805. He was licensed to preach by the Church of Scotland and ordained as minister of Bressay in the Shetland Islands in 1808. In 1810 he translated to the parish of Flisk in Fife and in 1832 translated to Clackmannan. In 1808, he participated in founding the Wernerian Society, a learned society devoted to the study of natural history. John Fleming became a Member of the Royal Society of London on 25 February 1813 (he was not granted Fellowship). In 1814, he was awarded an hon ... [...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] |
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] |
Bryozoa
Bryozoa (also known as the Polyzoa, Ectoprocta or commonly as moss animals) are a phylum of simple, aquatic invertebrate animals, nearly all living in sedentary colonies. Typically about long, they have a special feeding structure called a lophophore, a "crown" of tentacles used for filter feeding. Most marine bryozoans live in tropical waters, but a few are found in oceanic trenches and polar waters. The bryozoans are classified as the marine bryozoans (Stenolaemata), freshwater bryozoans (Phylactolaemata), and mostly-marine bryozoans (Gymnolaemata), a few members of which prefer brackish water. 5,869living species are known. At least two genera are solitary (''Aethozooides'' and ''Monobryozoon''); the rest are colonial. The terms Polyzoa and Bryozoa were introduced in 1830 and 1831, respectively. Soon after it was named, another group of animals was discovered whose filtering mechanism looked similar, so it was included in Bryozoa until 1869, when the two groups were no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ctenostomatida
The Ctenostomatida are an order of bryozoans in the class Gymnolaemata. The great majority of ctenostome species are marine, although ''Paludicella'' inhabits freshwater. They are distinguished from their close relatives, the cheilostomes, by their lack of a calcified exoskeleton. Instead, the exoskeleton is chitinous, gelatinous, or composed only of a soft membrane, and always lacks an operculum. Colonies of ctenostomes are often composed of elongated, branch-like stolon In biology, stolons (from Latin '' stolō'', genitive ''stolōnis'' – "branch"), also known as runners, are horizontal connections between organisms. They may be part of the organism, or of its skeleton; typically, animal stolons are external s ...s, although more compact forms also exist. References Protostome orders {{bryozoan-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World Register Of Marine Species
The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive list of names of marine organisms. Content The content of the registry is edited and maintained by scientific specialists on each group of organism. These taxonomists control the quality of the information, which is gathered from the primary scientific literature as well as from some external regional and taxon-specific databases. WoRMS maintains valid names of all marine organisms, but also provides information on synonyms and invalid names. It is an ongoing task to maintain the registry, since new species are constantly being discovered and described by scientists; in addition, the nomenclature and taxonomy of existing species is often corrected or changed as new research is constantly being published. Subsets of WoRMS content are made available, and can have separate badging and their own home/launch pages, as "subregisters", such as the ''World List of ... [...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] |
Walkeria Atlantica
''Walkeria'' is a genus of colonial bryozoans in the order Ctenostomatida. Species The World Register of Marine Species includes the following species in the genus: *'' Walkeria atlantica'' (Busk, 1886) *''Walkeria prorepens ''Walkeria'' is a genus of colonial bryozoans in the order Ctenostomatida. Species The World Register of Marine Species includes the following species in the genus: *'' Walkeria atlantica'' (Busk, 1886) *'' Walkeria prorepens'' Kubanin, 1 ...'' Kubanin, 1992 *'' Walkeria tuberosa'' Heller, 1867 *'' Walkeria uva'' (Linnaeus, 1758) References Ctenostomatida Bryozoan genera Taxa named by John Fleming (naturalist) {{Bryozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walkeria Prorepens
''Walkeria'' is a genus of colonial bryozoans in the order Ctenostomatida. Species The World Register of Marine Species includes the following species in the genus: *'' Walkeria atlantica'' (Busk, 1886) *'' Walkeria prorepens'' Kubanin, 1992 *'' Walkeria tuberosa'' Heller, 1867 *'' Walkeria uva'' (Linnaeus, 1758) References Ctenostomatida Bryozoan genera Taxa named by John Fleming (naturalist) {{Bryozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walkeria Tuberosa
''Walkeria tuberosa'' is a species of colonial bryozoan in the order Ctenostomatida. It is native to the Mediterranean Sea, and has spread to the Red Sea and the Indo-Pacific region. This species was first described in 1867 by the Austrian zoologist Camill Heller, and was named in honour of the Scottish minister and natural historian John Walker, a professor at the University of Edinburgh. There is some confusion as to whether the original scientific name of the bryozoan was ''Walkeria tuberosa'' or ''Valkeria tuberosa''. The genus name '' Walkeria'' was in 1994 given to a genus of dinosaurs, in this case being in honour of the British palaeontologist Alick Walker. When it was realised that the name had previously been used and was therefore not available, the dinosaurs were renamed '' Alwalkeria''. Description ''Walkeria tuberosa'' is a colonial bryozoan and forms small clusters developing from a thread-like stolon that creeps across the substrate. The zooids are vase- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walkeria Uva
''Walkeria uva'' is a species of colonial bryozoan in the order Ctenostomatida. It occurs on either side of the Atlantic Ocean, in the Baltic Sea, in the Mediterranean Sea and in the Indo-Pacific region. Description ''Walkeria uva'' is a colonial bryozoan that has thread-like stolons that creep across the substrate from which small clusters of zooids grow. The zooids have no stalks and are ovoid or tubular, growing direct from the stolon which seldom branches. There are up to ten zooids in each group, and the zooids are tipped by a bulge from which a pair of short lateral branches grow at right-angles. The whole colony is only about across. The colour is light beige or pale grey. The colonies are so small and inconspicuous that they may only be discovered by chance when the seaweed on which they are growing is examined in the laboratory. Distribution and habitat ''Walkeria uva'' occurs on either side of the Atlantic Ocean, in the Baltic Sea, the Mediterranean Sea, the Indian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
