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Oregoniidae
The Oregoniidae are a family of crabs, formerly included in the family Majidae. It contains the four genera ''Chionoecetes'', ''Hyas Hyas ( grc, Ὑάς, Hūás, ; ), in Greek mythology, was a Boeotian who was regarded as the ancestor of the ancient Hyantes (Boeotians). His name means rain from ''hyô, hyetos.'' Family Hyas was the son of the Titan Atlas and either of the ...'', '' Macroregonia'', and '' Oregonia''. References Majoidea Decapod families {{crab-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Majoidea
The Majoidea are a Superfamily (taxonomy), superfamily of crabs which includes the various spider crabs. Taxonomy In "''A classification of living and fossil genera of decapod crustaceans''" De Grave and colleagues divided Majoidea into six families: * Family Epialtidae ** Subfamily Epialtinae ** Subfamily Pisinae ** Subfamily Pliosomatinae ** Subfamily Tychiinae * Family Hymenosomatidae * Family Inachidae * Family Inachoididae * Family Majidae ** Subfamily Eurynolambrinae ** Subfamily Majinae ** Subfamily Micromaiinae ** Subfamily Mithracinae ** Subfamily Planoterginae * Family Oregoniidae The classification has since been revised, with subfamilies Epialtinae and Mithracinae being elevated to families and Hymenosomatidae being moved to its own superfamily. The family composition according to the World Register of Marine Species is as follows: * family Epialtidae MacLeay, 1838 * family Inachidae MacLeay, 1838 * family Inachoididae Dana, 1851 * family Macrocheiridae Dana, 1851 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hyas (genus)
''Hyas'' is a genus of oregoniid crabs. Species ''Hyas'' comprises five extant species: *'' Hyas alutaceus'' Brandt, 1851 *'' Hyas araneus'' (Linnaeus, 1758 Events January–March * January 1 – Swedish biologist Carl Linnaeus (Carl von Linné) publishes in Stockholm the first volume (''Animalia'') of the 10th edition of Systema Naturae, 10th edition of ''Systema Naturae'', the sta ...) *'' Hyas coarctatus'' Leach, 1815 *'' Hyas lyratus'' Dana, 1851 *'' Hyas ursinus'' Rathbun, 1924 References External links * Majoidea Decapod genera Taxa named by William Elford Leach {{crab-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oregonia (crab)
''Oregonia'' is a genus of crabs, comprising two extant species and one fossil species: It is classified in the family Oregoniidae under the spider crab superfamily Majoidea. Description The members of the genus are characterized by subtriangular or suboblong carapaces moderately covered with small protrusions (tubercles). They have large spines on the rear margins of the eye orbits (the postorbital spine) that are situated quite far from the eyestalks. The male chelipeds are elongated. The palms (manus) of the claws are long, compressed, and widen on the outer ends. The walking legs (pereiopods) are slender and decrease in length regularly towards the back. The abdomen (pleon) has seven segments. Species Three species are currently recognized under the genus: *'' Oregonia bifurca'' Rathbun, 1902 – the split-nose crab, found in deep waters of the northern Pacific Ocean, from the Bering Sea to the waters off British Columbia *''Oregonia gracilis'' Dana, 1851 – the graceful d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hyas Araneus
The great spider crab, ''Hyas araneus'', is a species of crab found in northeast Atlantic waters and the North Sea, usually below the tidal zone. In 1986, two specimens were captured at the South Shetland Islands off the Antarctic Peninsula The Antarctic Peninsula, known as O'Higgins Land in Chile and Tierra de San Martín in Argentina, and originally as Graham Land in the United Kingdom and the Palmer Peninsula in the United States, is the northernmost part of mainland Antarctic ..., apparently transported by human agency. It has been feared that the species would have an adverse effect on the native fauna, but there have been no further captures from the region since the 1986 specimens. The great spider crab can moult and get rid of their outer shell/skin. This can take some time but it lets them grow to great size. After they moult they are very vulnerable to predators because of a very soft exoskeleton. References Majoidea Crabs of the Atlantic Ocean Crustacean ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chionoecetes
''Chionoecetes'' is a genus of crabs that live in the northern Pacific and Atlantic Oceans. The genus ''Chionoecetes'' currently contains seven distinct species. Other names for crabs in this genus include "queen crab" (in Canada) and "spider crab" – they are known by different names in different areas of the world. The generic name ''Chionoecetes'' means snow (, ') inhabitant (, '); ' means shepherd, and '' C. opilio'' is the primary species referred to as snow crab. Marketing strategies, however, employ snow crab for any species in the genus ''Chionoecetes''. The name "snow crab" refers to their being commonly found in cold northern oceans. General Snow crab are caught as far north as the Arctic Ocean, from Newfoundland to Greenland and north of Norway in the Atlantic Ocean, and across the Pacific Ocean, including the Sea of Japan, the Bering Sea, the Gulf of Alaska, Norton Sound, and even as far south as California for ''Chionoecetes bairdi''. In 2019 the Norwegian Supre ... [...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] |
Crab
Crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting "tail" (abdomen) ( el, βραχύς , translit=brachys = short, / = tail), usually hidden entirely under the thorax. They live in all the world's oceans, in freshwater, and on land, are generally covered with a thick exoskeleton, and have a single pair of pincers. They first appeared during the Jurassic Period. Description Crabs are generally covered with a thick exoskeleton, composed primarily of highly mineralized chitin, and armed with a pair of chelae (claws). Crabs vary in size from the pea crab, a few millimeters wide, to the Japanese spider crab, with a leg span up to . Several other groups of crustaceans with similar appearances – such as king crabs and porcelain crabs – are not true crabs, but have evolved features similar to true crabs through a process known as carcinisation. Environment Crabs are found in all of the world's oceans, as well as in fresh w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Majidae
Majidae is a family of crabs, comprising around 200 marine species inside 52 genera, with a carapace that is longer than it is broad, and which forms a point at the front. The legs can be very long in some species, leading to the name "spider crab". The exoskeleton is covered with bristles to which the crab attaches algae and other items to act as camouflage. Genera The roughly 200 extant and over 50 extinct species are divided among 52 genera in 5 subfamilies: '' Eurynolambrinae'' Števčić, 1994 *'' Eurynolambrus'' H. Milne-Edwards & Lucas, 1841 '' Majinae'' Samouelle, 1819 *'' Ageitomaia'' Griffin & Tranter, 1986 *'' Anacinetops'' Miers, 1879 *''Choniognathus'' Rathbun, 1932 *'' Cyclax'' Dana, 1851 *'' Entomonyx'' Miers, 1884 *''Eurynome'' Leach, 1814 *'' Jacquinotia'' Rathbun, 1915 *'' Kasagia'' Richer de Forges & Ng, 2007 *'' Kimbla'' Griffin & Tranter, 1986 *''Leptomithrax'' Miers, 1876 *'' Maiopsis'' Faxon, 1893 *'' Maja'' Lamarck, 1801 *'' Majella'' Ortmann, 1893 *'' M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raffles Bulletin Of Zoology
''The Raffles Bulletin of Zoology'' is a peer-reviewed open-access scientific journal published by the Lee Kong Chian Natural History Museum at the National University of Singapore. It covers the taxonomy, ecology, and conservation of Southeast Asian fauna.Supplements are published as and when funding permits and may cover topics that extend beyond the normal scope of the journal depending on the targets of the funding agency. It was established as the ''Bulletin of the Raffles Museum'' in 1928 and renamed ''Bulletin of the National Museum of Singapore'' in 1961, before obtaining its current title in 1971. See also * List of zoology journals This is a list of scientific journals which cover the field of zoology. A * '' Acta Entomologica Musei Nationalis Pragae'' * '' Acta Zoologica Academiae Scientiarum Hungaricae'' * '' Acta Zoologica Bulgarica'' * ''Acta Zoologica Mexicana'' * '' ... References Zoology journals Biannual journals Open access journals English-language ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portable Document Format
Portable Document Format (PDF), standardized as ISO 32000, is a file format developed by Adobe in 1992 to present documents, including text formatting and images, in a manner independent of application software, hardware, and operating systems.Adobe Systems IncorporatedPDF Reference, Sixth edition, version 1.23 (53 MB) Nov 2006, p. 33. Archiv/ref> Based on the PostScript language, each PDF file encapsulates a complete description of a fixed-layout flat document, including the text, fonts, vector graphics, raster images and other information needed to display it. PDF has its roots in "The Camelot Project" initiated by Adobe co-founder John Warnock in 1991. PDF was standardized as ISO 32000 in 2008. The last edition as ISO 32000-2:2020 was published in December 2020. PDF files may contain a variety of content besides flat text and graphics including logical structuring elements, interactive elements such as annotations and form-fields, layers, rich media (including video con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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