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Austropotamobius Fulcisianus
''Austropotamobius'' is a genus of European crayfish in the family Astacidae. It contains four extant species, and one species known from fossils of Barremian age: *''Austropotamobius bihariensis'' Pârvulescu 2019 — Idle crayfish *'' Austropotamobius fulcisianus'' (Ninni, 1886) *''Austropotamobius pallipes'' (Lereboullet, 1858) — White-clawed crayfish *''Austropotamobius torrentium'' (Schrank, 1803) — Stone crayfish *'' Austropotamobius llopisi'' (Via, 1971) † A dagger, obelisk, or obelus is a typographical mark that usually indicates a footnote if an asterisk has already been used. The symbol is also used to indicate death (of people) or extinction (of species). It is one of the modern descendan ... References Astacidae Crustacean genera Taxonomy articles created by Polbot Extant Barremian first appearances {{Crayfish-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Austropotamobius Torrentium
''Austropotamobius torrentium'', also called the stone crayfish, is a European species of fresh water, freshwater crayfish in the family Astacidae. It is mostly found in tributaries of the Danube, having originated in the northern part of the Balkan Peninsula. Description ''A. torrentium'' grows to a length of around , and has a smooth brown carapace, with an untoothed triangular rostrum (anatomy), rostrum; the underside is creamy white. Males have larger claws than females, but females have a noticeably larger abdomen. As in other crayfish, the first two pairs of pleopods are specialised for sperm transfer in males, while the female's pleopods are uniform, and used for brooding egg (biology), eggs. Distribution The distribution of ''A. torrentium'' is centred on the Danube system, extending from the Olt River in Romania upstream to Germany and Switzerland and into parts of the Rhine and Elbe basins. It is widespread in southern Germany, Switzerland, Austria, Hungary, Slovenia, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Franz Von Paula Schrank
Franz von Paula Schrank (21 August 1747, in Vornbach – 22 December 1835) was a German priest, botanist and entomologist. He was ordained as a priest in Vienna in 1784, gaining his doctorate in theology two years later. In 1786 he was named chair of mathematics and physics at the lyceum in Amberg, and in 1784 became a professor of botany and zoology at the University of Ingolstadt (later removed to Landshut). at Catholic Encyclopedia Schrank was the first director of the botanical gardens in from 1809 to 1832. Schrank was the first author to use the name '' |
Crayfish
Crayfish are freshwater crustaceans belonging to the clade Astacidea, which also contains lobsters. In some locations, they are also known as crawfish, craydids, crawdaddies, crawdads, freshwater lobsters, mountain lobsters, rock lobsters, mudbugs, baybugs or yabbies. Taxonomically, they are members of the superfamilies Astacoidea and Parastacoidea. They breathe through feather-like gills. Some species are found in brooks and streams, where fresh water is running, while others thrive in swamps, ditches, and paddy fields. Most crayfish cannot tolerate polluted water, although some species, such as ''Procambarus clarkii'', are hardier. Crayfish feed on animals and plants, either living or decomposing, and detritus. The term "crayfish" is applied to saltwater species in some countries. Terminology The name "crayfish" comes from the Old French word ' (Modern French '). The word has been modified to "crayfish" by association with "fish" (folk etymology). The largely American ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astacidae
Astacidae is a family of freshwater crayfish native to Europe and western North America. The family is made up of four extant (living) genera: The genera ''Astacus'' (which includes the European crayfish), ''Pontastacus'' (which includes the Turkish crayfish), and ''Austropotamobius'' are all found throughout Europe and parts of western Asia, while ''Pacifastacus'' is found on the Pacific coast of the United States and British Columbia and includes the signal crayfish and the Shasta crayfish. Classification and Phylogeny Astacidae belongs to the superfamily Astacoidea, which contains all crayfish in the Northern Hemisphere. Astacoidea is the sister taxon to Parastacoidea, which contains all crayfish of the Southern Hemisphere. Crayfish and lobsters together comprise the infraorder Astacidea, as shown in the simplified cladogram below: The internal phylogeny of Astacidae can be further shown in the cladogram below: Species The family Astacidae contains the following genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extant Taxon
Neontology is a part of biology that, in contrast to paleontology, deals with living (or, more generally, '' recent'') organisms. It is the study of extant taxa (singular: extant taxon): taxa (such as species, genera and families) with members still alive, as opposed to (all) being extinct. For example: * The moose (''Alces alces'') is an extant species, and the dodo (''Raphus cucullatus'') is an extinct species. * In the group of molluscs known as the cephalopods, there were approximately 600 extant species and 7,500 extinct species. A taxon can be classified as extinct if it is broadly agreed or certified that no members of the group are still alive. Conversely, an extinct taxon can be reclassified as extant if there are new discoveries of living species ("Lazarus species"), or if previously-known extant species are reclassified as members of the taxon. Most biologists, zoologists, and botanists are in practice neontologists, and the term neontologist is used large ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossil
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood and DNA remnants. The totality of fossils is known as the ''fossil record''. Paleontology is the study of fossils: their age, method of formation, and evolutionary significance. Specimens are usually considered to be fossils if they are over 10,000 years old. The oldest fossils are around 3.48 billion years old to 4.1 billion years old. Early edition, published online before print. The observation in the 19th century that certain fossils were associated with certain rock strata led to the recognition of a geological timescale and the relative ages of different fossils. The development of radiometric dating techniques in the early 20th century allowed scientists to quantitatively measure the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barremian
The Barremian is an age in the geologic timescale (or a chronostratigraphic stage) between 129.4 ± 1.5 Ma (million years ago) and 121.4 ± 1.0 Ma). It is a subdivision of the Early Cretaceous Epoch (or Lower Cretaceous Series). It is preceded by the Hauterivian and followed by the Aptian Stage.See Gradstein ''et al.'' (2004) or the online geowhen database (link below) Stratigraphic definitions The original type locality for the Barremian Stage is in the vicinity of the village of Barrême, Alpes-de-Haute-Provence, France. Henri Coquand defined the stage and named it in 1873. The base of the Barremian is determined by the first appearance of the ammonites ''Spitidiscus hugii'' and ''Spitidiscus vandeckii''. The end of the Barremian is determined by the geomagnetic reversal at the start of the M0r chronozone, which is biologically near the first appearance of the ammonite '' Paradeshayesites oglanlensis''. Regional equivalents The Barremian falls in the Gallic epoch, a su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Loren E
Loren is a given name, nickname and surname which may refer to: Given name Men * Loren Acton (born 1936), American physicist and astronaut * Loren C. Ball (born 1948), amateur astronomer who has discovered more than 100 asteroids * Loren M. Berry (1888–1980), American businessman * Loren Bouchard (born 1970), American television writer and director * Loren Cameron (born 1959), American photographer * Loren Carpenter (born 1947), American computer graphics researcher and developer * Loren Coleman (born 1947), American scientist and author * Loren L. Coleman (born 1947), American science-fiction writer * Loren W. Collins (1838–1912), American jurist and politician * Loren Mazzacane Connors (born 1949), American musician * Loren Crabtree (born 1940), American academic and chancellor * Loren Cunningham (born 1936), American missionary organizer * Loren Dean (born 1969), American actor * Loren C. Dunn (1930–2001), American general authority of the LDS Church * Loren Eiseley ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Journal Of Crustacean Biology
The ''Journal of Crustacean Biology'' is a quarterly peer-reviewed scientific journal in the field of carcinology (crustacean research). It is published by The Crustacean Society and Oxford University Press (formerly by Brill Publishers and Allen Press), and since 2015 the editor-in-chief has been Peter Castro. According to the ''Journal Citation Reports'', its 2016 impact factor is 1.064. The journal has a mandatory publication fee of US$ 115 per printed page for non-members of the SocietyJournal of Crustacean BiologyInstructions for Authors/ref> and an optional open access Open access (OA) is a set of principles and a range of practices through which research outputs are distributed online, free of access charges or other barriers. With open access strictly defined (according to the 2001 definition), or libre op ... fee of $1830 minimum. References Further reading * * External links {{Wikispecies-inline, ISSN 0278-0372 Carcinology journals Publications establi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Austropotamobius Bihariensis
''Austropotamobius bihariensis'' is a species of crayfish in the family Astacidae. It is known to exist only in Romania being restricted to the rivers in the western Apuseni Mountains. Its proposed English common name is idle crayfish. It is supposed to have diverged/split ~15 Ma old from a common relative of ''A. torrentium'' from the Dinarides and evolved isolated due to the historically tectonic north-eastern movement of Tisza-Dacia mega-unit (including the Apuseni Mountains) through the Pannonian Basin, during the Miocene. The molecular divergence in 582 base length nucleotides of COI mtDNA sequences is supported by 43 mutational steps, a differentiation of 7.4% from the sister clade of ''A. torrentium'' located in north-western Dinarides Description This crayfish strongly resembles its close relative '' A. torrentium''. The individuals, not longer than 10 cm, are brown dorsally, showing lighter colors on the ventral side with hints of orange on the claws. In comparis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Austropotamobius Fulcisianus
''Austropotamobius'' is a genus of European crayfish in the family Astacidae. It contains four extant species, and one species known from fossils of Barremian age: *''Austropotamobius bihariensis'' Pârvulescu 2019 — Idle crayfish *'' Austropotamobius fulcisianus'' (Ninni, 1886) *''Austropotamobius pallipes'' (Lereboullet, 1858) — White-clawed crayfish *''Austropotamobius torrentium'' (Schrank, 1803) — Stone crayfish *'' Austropotamobius llopisi'' (Via, 1971) † A dagger, obelisk, or obelus is a typographical mark that usually indicates a footnote if an asterisk has already been used. The symbol is also used to indicate death (of people) or extinction (of species). It is one of the modern descendan ... References Astacidae Crustacean genera Taxonomy articles created by Polbot Extant Barremian first appearances {{Crayfish-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Austropotamobius Pallipes
''Austropotamobius pallipes'' is an endangered European freshwater crayfish, and the only crayfish native to the British Isles. Its common names include white-clawed crayfish and Atlantic stream crayfish. Distribution It is found from the easterly Balkan Peninsula to Spain and reaches its northerly limit in Great Britain, as well as Ireland (where it is considered introduced), where it is limited to some regions only: its highest densities are in chalk streams. ''A. pallipes'' is the only crayfish found in Ireland, occurring over limestone areas in rivers, streams, canals, and lakes. In France, ''A. pallipes'' is found in streams such as the Mornante and Sellon, two small tributaries of the Dorlay in the Loire department. It is protected as a heritage species. It has also been introduced to Corsica, Liechtenstein, and Portugal (from where it is now extirpated). It was once found across most of Great Britain; however its distribution is rapidly shrinking, and it is recorded in Y ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
