|
Gramastacus
''Gramastacus'' is a genus of freshwater crayfish species from southeast Australia. It has two described species. Discovery Two species of ''Gramastacus'' were originally scientific description, described in 1972 by Edgar Riek from the Grampians (region), Grampian region of western Victoria (state), Victoria, Australia: ''Gramastacus insolitus'' and ''Gramastacus gracilis''. In 1990, ''G. gracilis'' was determined to be a junior synonym of ''G. insolitus''. In 2014, a new species ''Gramastacus lacus'' from the coastal regions of New South Wales was formally described by McCormack. Species *Western Swamp Crayfish - ''Gramastacus insolitus'' Riek, 1972 (western Victoria, Australia) - a very small non-burrowing crayfish that shares burrows with larger crayfish species *Eastern Swamp Crayfish - ''Gramastacus lacus'' McCormack, 2014 (coastal regions of New South Wales, Australia) - a larger, more robust crayfish species that digs their own burrows References {{Taxonbar, from=Q ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gramastacus Lacus
The eastern swamp crayfish (''Gramastacus lacus'') is a species of small freshwater crayfish from coastal New South Wales, Australia. It is distinguished from related species by large genital papilla on the males, large raised postorbital ridges, a laterally compressed carapace, and elongated Chela (organ), chelae. Etymology The specific name is derived from Latin '':wikt:lacus, lacus'', referring to the coastal lakes that the species is found in. Before it was formally described it was known by the common name "lake yabby". Discovery Specimens of ''Gramastacus lacus'' were first discovered in the Ramsar Convention, Ramsar wetlands of Myall Lakes National Park. More specimens were collected as part of the Australian Crayfish Project, starting in 2005. Description The species reaches a maximum weight of and a length of . The vast majority of specimens are smaller, with the average weight being around to . The Rostrum (anatomy), rostum is long and narrow with a spine at the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gramastacus Insolitus
''Gramastacus'' is a genus of freshwater crayfish species from southeast Australia. It has two described species. Discovery Two species of ''Gramastacus'' were originally described in 1972 by Edgar Riek from the Grampian region of western Victoria, Australia: '' Gramastacus insolitus'' and ''Gramastacus gracilis''. In 1990, ''G. gracilis'' was determined to be a junior synonym of ''G. insolitus''. In 2014, a new species ''Gramastacus lacus'' from the coastal regions of New South Wales was formally described by McCormack. Species *Western Swamp Crayfish - '' Gramastacus insolitus'' Riek, 1972 (western Victoria, Australia) - a very small non-burrowing crayfish that shares burrows with larger crayfish species *Eastern Swamp Crayfish - ''Gramastacus lacus The eastern swamp crayfish (''Gramastacus lacus'') is a species of small freshwater crayfish from coastal New South Wales, Australia. It is distinguished from related species by large genital papilla on the males, large raise ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parastacidae
The Parastacidae are the family of freshwater crayfish found in the Southern Hemisphere. The family is a classic Gondwana-distributed taxon, with extant members in South America, Madagascar, Australia, New Zealand, and New Guinea, and extinct taxa also in Antarctica. Distribution Three genera are found in Chile, '' Virilastacus'', ''Samastacus'' and ''Parastacus'', the last of which also occurs disjunctly in southern Brazil and Uruguay. There are no crayfish native to continental Africa, but seven species on Madagascar, all of the genus ''Astacoides''. Australasia is particularly rich in crayfish. The small genus '' Paranephrops'' is endemic to New Zealand. The genera '' Astacopsis'' is endemic to Tasmania, while a further two are found on either side of the Bass Strait – ''Geocharax'' and ''Engaeus''. The greatest diversity, however, is found on the Australian mainland. Three genera are endemic and have restricted distributions ('' Engaewa'', ''Gramastacus'' and ''Ten ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edgar Riek
Edgar Frederick Riek (1920–2016) was an Australian entomologist and invertebrate zoologist known for his research on fossil insects and the taxonomy of freshwater crayfish. He later became known as prominent viticulturist and winemaker. Affiliated with the CSIRO for over 30 years, he wrote the first pocket field guide to Australian insects, described over 230 species, and is commemorated in the names of over 80 species. After retiring from the CSIRO he became a noted figure in the Australian wine industry, co-founding the Canberra and District Vignerons Association and receiving the Order of Australia Medal (1996) for his work. Edgar Riek was born 1 May 1920 in Napier, New Zealand, to Australian parents. He was raised in Caboolture, Queensland, attended Brisbane Grammar School, and entered the University of Queensland in 1939 where he worked as an assistant in the Geology Department. He majored in Geology and Biology, earned a B.S. from the University of Queensland in 1942, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
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 c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freshwater
Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the term specifically excludes seawater and brackish water, it does include non- salty mineral-rich waters such as chalybeate springs. Fresh water may encompass frozen and meltwater in ice sheets, ice caps, glaciers, snowfields and icebergs, natural precipitations such as rainfall, snowfall, hail/ sleet and graupel, and surface runoffs that form inland bodies of water such as wetlands, ponds, lakes, rivers, streams, as well as groundwater contained in aquifers, subterranean rivers and lakes. Fresh water is the water resource that is of the most and immediate use to humans. Water is critical to the survival of all living organisms. Many organisms can thrive on salt water, but the great majority of higher plants and most insects, amphibians, reptiles, mammals and birds need fresh water ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australia
Australia, officially the Commonwealth of Australia, is a sovereign ''Sovereign'' is a title which can be applied to the highest leader in various categories. The word is borrowed from Old French , which is ultimately derived from the Latin , meaning 'above'. The roles of a sovereign vary from monarch, ruler or ... country comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands. With an area of , Australia is the largest country by area in Oceania and the world's sixth-largest country. Australia is the oldest, flattest, and driest inhabited continent, with the least fertile soils. It is a megadiverse country, and its size gives it a wide variety of landscapes and climates, with deserts in the centre, tropical Forests of Australia, rainforests in the north-east, and List of mountains in Australia, mountain ranges in the south-east. The ancestors of Aboriginal Australians began arriving from south east Asia approx ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scientific Description
A species description is a formal description of a newly discovered species, usually in the form of a scientific paper. Its purpose is to give a clear description of a new species of organism and explain how it differs from species that have been described previously or are related. In order for species to be validly described, they need to follow guidelines established over time. Zoological naming requires adherence to the ICZN code, plants, the ICN, viruses ICTV, and so on. The species description often contains photographs or other illustrations of type material along with a note on where they are deposited. The publication in which the species is described gives the new species a formal scientific name. Some 1.9 million species have been identified and described, out of some 8.7 million that may actually exist. Millions more have become extinct throughout the existence of life on Earth. Naming process A name of a new species becomes valid (available in z ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grampians (region)
The Grampians is an economic rural region located in the western part of Victoria, Australia. The region lies to the northwest of the western suburbs of Greater Melbourne, to the state's western border with South Australia and includes the Grampians National Park and significant gold mining heritage assets. The Grampians region has two sub-regions, Grampians Central Highlands and Wimmera Southern Mallee. As at the 2016 Australian census, the Grampians region had a population of , with almost half of the population located in the City of Ballarat. The principal centres of the region, in descending order of population, are Ballarat, Bacchus Marsh, , , and . Administration Political representation For the purposes of Australian federal elections for the House of Representatives, the Grampians region is contained within all or part of the electoral divisions of Ballarat, Corangamite, Mallee, and Wannon. For the purposes of Victorian elections for the Legislative As ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Victoria (state)
Victoria is a state in southeastern Australia. It is the second-smallest state with a land area of , the second most populated state (after New South Wales) with a population of over 6.5 million, and the most densely populated state in Australia (28 per km2). Victoria is bordered by New South Wales to the north and South Australia to the west, and is bounded by the Bass Strait to the south (with the exception of a small land border with Tasmania located along Boundary Islet), the Great Australian Bight portion of the Southern Ocean to the southwest, and the Tasman Sea (a marginal sea of the South Pacific Ocean) to the southeast. The state encompasses a range of climates and geographical features from its temperate coastal and central regions to the Victorian Alps in the northeast and the semi-arid north-west. The majority of the Victorian population is concentrated in the central-south area surrounding Port Phillip Bay, and in particular within the metropolita ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Junior Synonym
The Botanical and Zoological Codes of nomenclature treat the concept of synonymy differently. * In botanical nomenclature, a synonym is a scientific name that applies to a taxon that (now) goes by a different scientific name. For example, Linnaeus was the first to give a scientific name (under the currently used system of scientific nomenclature) to the Norway spruce, which he called ''Pinus abies''. This name is no longer in use, so it is now a synonym of the current scientific name, '' Picea abies''. * In zoology, moving a species from one genus to another results in a different binomen, but the name is considered an alternative combination rather than a synonym. The concept of synonymy in zoology is reserved for two names at the same rank that refers to a taxon at that rank - for example, the name ''Papilio prorsa'' Linnaeus, 1758 is a junior synonym of ''Papilio levana'' Linnaeus, 1758, being names for different seasonal forms of the species now referred to as ''Araschnia le ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
