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Spider Crab
The Majoidea are a 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. 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: * Epialtidae MacLeay, 1838 * Inachidae MacLeay, 1838 * Inachoididae Dana, 1851 * Macrocheiridae Dana, 1851 * Majidae Samouelle, 1819 – "true" spider crabs * Mithracidae Balss, 1929 * Oregoniidae Garth, 1958 * Priscinachidae Breton, 2009 Notable species within the superfamily include: * Japanese spider crab (''Macrocheira kaempferi''), the largest living species of crab, found on the bottom of the Pacific Ocean. * '' Libinia emarginata'', the portly spider crab, a species of crab found in estuarin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Spider Crab
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 Martin 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 Antarctica. ..., 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 Crustacea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Macropodia Rostrata
''Macropodia rostrata'', common names, the common spider crab, long-legged spider crab, long-legged crab, is a species of marine crab in the family Inachidae. The Macropodia Rostrata visually mimics many other types of small crabs with the exception of its long legs. By attaching algae to their thin legs, they can be confused with the stem of seaweed. This is both a defense mechanism and a predatory advantage, as unsuspecting fish will hide in seaweed beds from nearby predators. This behavior can be absent among larger crabs, and those that live at great depths like giant Japanese spider crabs. Description ''Macropodia rostrata'' has a hairy, or fuzzy appearance due to algae it applies to itself for camouflage. Both the carapace and pereiopods of this species are greyish to yellowish or reddish-brown in colour, with some specimens showing white markings. The carapace grows to a maximum length of 16 (28) mm, with the anterior part is narrowing, giving it a pear shape. The length of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cenomanian First Appearances
The Cenomanian is, in the International Commission on Stratigraphy's (ICS) geological timescale, the oldest or earliest age of the Late Cretaceous Epoch or the lowest stage of the Upper Cretaceous Series. An age is a unit of geochronology; it is a unit of time; the stage is a unit in the stratigraphic column deposited during the corresponding age. Both age and stage bear the same name. As a unit of geologic time measure, the Cenomanian Age spans the time between 100.5 and 93.9 million years ago (Mya). In the geologic timescale, it is preceded by the Albian and is followed by the Turonian. The Upper Cenomanian starts around at 95 Mya. The Cenomanian is coeval with the Woodbinian of the regional timescale of the Gulf of Mexico and the early part of the Eaglefordian of the regional timescale of the East Coast of the United States. At the end of the Cenomanian, an anoxic event took place, called the Cenomanian-Turonian boundary event or the "Bonarelli event", that is associated with ... [...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. 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: * Epialtidae MacLeay, 1838 * Inachidae MacLeay, 1838 * Inachoididae Dana, 1851 * Macrocheiridae Dana, 1851 * Majidae Samouelle, 1819 – "true" spider crabs * Mithracidae Balss, 1929 * Oregoniidae Garth, 1958 * Priscinachidae Breton, 2009 Notable species within the superfamily include: * Japanese spider crab (''Macrocheira kaempferi''), the largest living species of crab, found on the bottom of the Pacific Ocean. * ''Libinia emarginata'', the portly spider crab, a species of cra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hyas Coarctatus
''Hyas coarctatus'' is a marine crab species native to the North Atlantic. It is characterized by a lyriformed shell. Morphology ''Hyas coarctatus'' looks like the great spider crab (''H. araneus'') but has a lyriformed shell. The carapace of a large specimen is up to 60 mm long and 44 mm wide. The colour is grey-brown on the dorsal side, sometimes with a bit reddish, the ventral side is dirty white. The rostral horns of ''H. coarctatus'' are slightly longer and spaced further apart than in ''H. araneus''. Chelipeds are longer than in ''H. araneus''. The outer segment of the walking legs is often more or less furry. Distribution and ecology ''Hyas coarctatus'' is found at both hard, stony, sandy and soft bottoms from 1 to 500 meters depth, though most often above 50 meters. ''H. araneus'' inhabits shallower depths. ''H. coarctatus'' is widely distributed in the North-East Atlantic and adjacent seas. The northern border is around the north and west coasts of Spitsbergen and Ba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyromaia Cuspidata
''Pyromaia cuspidata'', also known as the dartnose pear crab, is a species of crab in the family Inachoididae. This crab appears similar to '' Anasimus latus''. It is a long-legged crab with a trident-shaped rostrum, and occurs in Atlantic waters from North Carolina to west Florida, and in the Gulf of Mexico through the Yucatán Peninsula down to Nicaragua. It is also found in Cuba Cuba, officially the Republic of Cuba, is an island country, comprising the island of Cuba (largest island), Isla de la Juventud, and List of islands of Cuba, 4,195 islands, islets and cays surrounding the main island. It is located where the ...n waters. This species lives in depths of on bottoms of mud, sand, or pebbles. References Majoidea Crabs of the Atlantic Ocean Crustaceans described in 1871 {{Majoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Macrocheira Kaempferi
The Japanese giant spider crab (''Macrocheira kaempferi'') is a species of marine crab and is the biggest one that lives in the waters around Japan. At around 3.7 meters, it has the largest leg-span of any arthropod. The Japanese name for this species is ''taka-ashi-gani'', (Japanese: ; ), literally translating to "tall-legged crab". It goes through three main larval stages along with a prezoeal stage to grow to its great size. The genus ''Macrocheira'' contains multiple species. Two fossil species of this genus have been found: ''M. ginzanensis'' and ''M. yabei'', both from the Miocene of Japan. Its diverse taxonomic history is an important part of what these creatures are and how they evolved to be what they are today. They are sought by crab fisheries, and are considered a delicacy in Japan. To prevent overexploitation from harming the species, conservation efforts have been put in place to protect them and their population from overfishing. The Japanese giant spider crab i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hymenosomatidae
Hymenosomatidae is a family of crabs with some 110 described species in 24 genera. The following genera are placed in the Hymenosomatidae: *'' Amarinus'' *'' Apechocinus'' *''Cancrocaeca'' *'' Crustaenia'' *'' Culexisoma'' *'' Elamena'' *'' Elamenopsis'' *'' Guaplax'' *'' Halicarcinides'' *'' Halicarcinus'' *'' Halimena'' *'' Hymenicoides'' *'' Hymenosoma'' *'' Limnopilos'' *'' Lucascinus'' *''Micas Micas ( ) are a group of silicate minerals whose outstanding physical characteristic is that individual mica crystals can easily be split into fragile elastic plates. This characteristic is described as ''perfect Cleavage (crystal), basal cle ...'' *'' Neohymenicus'' *'' Neorhynchoplax'' *'' Nasutoplax'' *'' Odiomaris'' *'' Rhynchoplax'' *'' Stimpsoplax'' *'' Sulaplax'' *'' Trigonoplax'' References External links Australian Government Department of Environment & Heritage Crabs Decapod families {{Eubrachyura-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limnopilos Naiyanetri
''Limnopilos naiyanetri'', commonly referred to as the Thai micro crab or pill-box crab, is a freshwater hymenosomatid crab endemic to Thailand. Its presence has only been confirmed in the Tha Chin River. The species was described in 1991 and represents the type species of ''Limnopilos''. The Thai micro crab was first introduced to the aquarium hobby in 2008 when it was imported to Germany by the tropical fish importer Aquarium Glaser GmbH, and has slowly grown in popularity with aquarium hobbyists. It remains a relatively rare species on the market and detailed information on the husbandry of this species is scarce. Description This species is quite small, the carapace reaching only 1 cm in width at maturity. The leg span may reach lengths of 2.5 cm. Individuals of this species are semi-translucent and range from grey to light brown. It has a circular, flat carapace with contiguous gastro-cardiac grooves and margin. A defining feature of this species is a setose or pilose ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hoplophrys Oatesi
''Hoplophrys'' is a monotypic genus of crab in the family Epialtidae. It contains the single species ''Hoplophrys oatesii'', also known as the candy crab, Oates's soft coral crab, commensal soft coral crab and ''Dendronephthya'' crab. Description ''Hoplophrys oatesii'' is a very colorful crab that grows from . It lives on various species of soft coral in the genus '' Dendronephthya''. It camouflages itself by mimicking the colours of the polyps among which it hides. It adds further camouflage by attaching polyps to its carapace. Colours vary depending on the colour of the coral, and may be white, pink, yellow or red. The first pair of legs of this species has small claws. The body has pointed spines with a red and white pattern, similar in appearance to the host coral. Distribution and habitat This crab is widespread in the Indo-Pacific in tropical climates. It is found in the benthic zone The benthic zone is the ecological region at the lowest level of a body of water su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geodiversitas
The French National Museum of Natural History ( ; abbr. MNHN) is the national natural history museum of France and a of higher education part of Sorbonne University. The main museum, with four galleries, is located in Paris, France, within the Jardin des Plantes on the left bank of the River Seine. It was formally founded in 1793, during the French Revolution, but was begun even earlier in 1635 as the royal garden of medicinal plants. The museum now has 14 sites throughout France. Since the 2014 reform, it has been headed by a chairman, assisted by deputy managing directors. The Museum has a staff of approximately 2,350 members, including six hundred researchers. It is a member of the national network of naturalist collections (RECOLNAT). History 17th–18th century File:Jardin du roi 1636.png, The Royal Garden of Medicinal Plants in 1636 File:Buffon statue dsc00979.jpg, Statue of Georges-Louis Leclerc, Comte de Buffon in the formal garden File:Buffon, Georges Louis - Leclerc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cenomanian
The Cenomanian is, in the International Commission on Stratigraphy's (ICS) geological timescale, the oldest or earliest age (geology), age of the Late Cretaceous epoch (geology), Epoch or the lowest stage (stratigraphy), stage of the Upper Cretaceous series (stratigraphy), Series. An age is a unit of geochronology; it is a unit of time; the stage is a unit in the stratigraphic column deposited during the corresponding age. Both age and stage bear the same name. As a unit of geologic time measure, the Cenomanian Age spans the time between 100.5 and 93.9 million years ago (Mya). In the geologic timescale, it is preceded by the Albian and is followed by the Turonian. The Upper Cenomanian starts around at 95 Mya. The Cenomanian is coeval with the Woodbinian of the regional timescale of the Gulf of Mexico and the early part of the Eaglefordian of the regional timescale of the East Coast of the United States. At the end of the Cenomanian, an anoxic event took place, called the Cenomani ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
