Xanthoidea

	Xanthoidea Xanthoidea is a Taxonomic rank, superfamily of crabs, comprising seven families. Formerly, a number of other families were included in Xanthoidea, but many of these have since been removed to other superfamilies. These include Carpilioidea, Eriphioidea, Hexapodidae, Hexapodoidea, Pilumnoidea and Trapezioidea. Even in this reduced state, Xanthoidea remains one of the most species-rich superfamilies of crabs. Families The World Register of Marine Species lists the following families: Antrocarcinidae Garthiellidae Linnaeoxanthidae Nanocassiopidae Panopeidae Pseudorhombilidae Xanthidae References Xanthoidea, Crabs Crustacean superfamilies {{Xanthoidea-stub ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
picture info	Crabs Crabs are decapod crustaceans of the infraorder Brachyura (meaning "short tailed" in Greek), which typically have a very short projecting tail-like abdomen, usually hidden entirely under the thorax. Their exoskeleton is often thickened and hard. They generally have five pairs of legs, and they have "pincers" or "claws" on the ends of the frontmost pair, scientifically termed the '' chelae''. They are present in all the world's oceans, in freshwater, and on land, often hiding themselves in small crevices or burrowing into sediment. Crabs are omnivores, feeding on a variety of food, including a significant proportion of algae, as well as detritus and other invertebrates. Crabs are widely consumed by humans as food, with over 1.5 million tonnes caught annually. True crabs first appeared in the fossil record during the Jurassic period, around 200 million years ago, achieving great diversity by the Cretaceous period; around 7,000 extant species in 96 families are known. A numb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Crab Crabs are decapod crustaceans of the infraorder Brachyura (meaning "short tailed" in Greek language, Greek), which typically have a very short projecting tail-like abdomen#Arthropoda, abdomen, usually hidden entirely under the Thorax (arthropod anatomy), thorax. Their exoskeleton is often Sclerotization, thickened and hard. They generally have Arthropod leg, five pairs of legs, and they have "Pincers (tool), pincers" or "claws" on the ends of the frontmost pair, scientifically termed the ''chelae''. They are present in all the world's oceans, Freshwater crab, in freshwater, and Terrestrial crab, on land, often hiding themselves in small crevices or burrowing into sediment. Crabs are omnivores, feeding on a variety of food, including a significant proportion of Algae eater, algae, as well as Detritivore, detritus and other invertebrates. Crab meat, Crabs are widely consumed by humans as food, with over 1.5 million tonnes Crab fisheries, caught annually. True crabs first appeared ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Xanthidae Xanthidae is a family (biology), family of crabs known as gorilla crabs, mud crabs, pebble crabs or rubble crabs. Xanthid crabs are often brightly coloured and are highly poisonous, containing toxins which are not destroyed by cooking and for which no antidote is known. The toxins are similar to the tetrodotoxin and saxitoxin produced by Tetraodontidae, puffer fish, and may be produced by bacteria in the genus ''Vibrio'' living in symbiosis with the crabs, mostly ''Vibrio alginolyticus, V. alginolyticus'' and ''Vibrio parahaemolyticus, V. parahaemolyticus''. Classification Many species formerly included in the family Xanthidae have since been moved to new families. Despite this, Xanthidae is still the largest crab family in terms of species richness, contanining the following subfamilies and genera: Actaeinae ''Actaea (crab), Actaea'' ''Actaeodes'' ''Actaeops'' † ''Allactaea'' ''Eoxanthops'' † ''Epiactaea'' ''Epiactaeodes'' ''Forestiana'' ''Gaill ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Pilumnoidea Pilumnoidea is a superfamily of crabs, whose members were previously included in the Xanthoidea. The three families are unified by the free articulation of all the segments of the male crab's abdomen and by the form of the gonopods. The earliest fossils assigned to this group are of Eocene age. Classification Pilumnidae is by far the largest of the three families, with 73 of the 78 genera: ; Pilumnidae Samouelle, 1819 * Subfamily Calmaniinae Števčić, 1991 ** '' Calmania'' Laurie, 1906 * Subfamily Pilumninae Samouelle, 1819 '' Actumnus'' Dana, 1851 '' Aniptumnus'' Ng, 2002 '' Bathypilumnus'' Ng & L. W. H. Tan, 1984 '' Benthopanope'' Davie, 1989 '' Budapanopeus'' † Müller & Collins, 1991 '' Cryptopilumnus'' Hsueh, Huang & Ng, 2009 '' Danielum'' Vázquez-Bader & Gracia, 1995 '' Eohalimede'' † Blow & Manning, 1996 '' Eopilumnus'' † Beschin ''et al.'', 2002 '' Eumorphactaea'' † Bittner, 1875 '' Eurycarcinus'' A. Milne-Ed ... [...More Info...] [...Related Items...] OR:** [Wikipedia] [Google] [Baidu]
	Linnaeoxanthidae ''Linnaeoxanthus'' is a genus of crab Crabs are decapod crustaceans of the infraorder Brachyura (meaning "short tailed" in Greek language, Greek), which typically have a very short projecting tail-like abdomen#Arthropoda, abdomen, usually hidden entirely under the Thorax (arthropo ..., whose only species is ''Linnaeoxanthus acanthomerus''. ''Linnaeoxanthus'' is the only genus of the family Linnaeoxanthidae.Števčić, Z. (2005). Reklasifikacija kratkorepih rakova (Crustacea: Decapoda: Brachyura) he reclassification of brachyuran crabs (Crustacea: Decapoda: Brachyura) ''Natura Croatica''. 14(suppl. 1), 1-159. References Xanthoidea Monotypic decapod genera {{Xanthoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Carpilioidea Carpilioidea is a superfamily of crabs containing a single extant family, Carpiliidae and four extinct families. The modern range of the family includes the Indo-Pacific, Western Atlantic and Caribbean Sea. The fossil record of the group extends back at least as far as the Paleocene The Paleocene ( ), or Palaeocene, is a geological epoch (geology), epoch that lasted from about 66 to 56 mya (unit), million years ago (mya). It is the first epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), .... Genera Arabicarcinidae Carpiliidae Paleoxanthopsidae Tumidocarcinidae Zanthopsidae References External links * * Crabs Extant Paleocene first appearances Taxa named by Arnold Edward Ortmann {{Carpilioidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Panopeidae The Panopeidae are a family (biology), family containing 26 genera of morphologically similar crabs, often known as "mud crabs". Their center of diversity, centers of diversity are the Atlantic Ocean and eastern Pacific Ocean. Distribution Most members of the family Panopeidae live in the Atlantic Ocean or eastern Pacific Ocean. Only one species occurs in Australian waters – ''Homoioplax haswelli''. Ecology The various genera of the Panopeidae are morphologically similar, partly as a result of many instances of convergent evolution to similar habitats and food preferences. Crabs of the family Panopeidae are all free-living (not commensalism, commensal or parasitic), and typically live in soft-bottomed parts of the ocean, lending them the common name "mud crabs" (a name also shared by mud crab (other), other organisms). They burrow into the sediment and feed on a variety of marine invertebrates. Genera The World Register of Marine Species lists these subfamilies and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Trapezioidea Trapezioidea is a superfamily of crabs. Its members live symbiotically with corals and have a fossil record stretching back to the Eocene. Families The World Register of Marine Species The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive catalogue and list of names of marine organisms. Content The content of the registry is edited and maintained by scien ... lists the following families: References Crabs Crustacean superfamilies {{Trapezioidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]