Calappoidea

	Calappoidea Calappoidea is a superfamily of crabs comprising the two families Calappidae and Matutidae. The earliest fossils attributable to the Calappoidea date from the Aptian The Aptian is an age in the geologic timescale or a stage in the stratigraphic column. It is a subdivision of the Early or Lower Cretaceous Epoch or Series and encompasses the time from 121.4 ± 1.0 Ma to 113.0 ± 1.0 Ma (million years ago), a .... References External links * Crabs Aptian first appearances Taxa named by Henri Milne-Edwards Arthropod superfamilies Extant Aptian first appearances {{crab-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Calappoidea Calappoidea is a superfamily of crabs comprising the two families Calappidae and Matutidae. The earliest fossils attributable to the Calappoidea date from the Aptian The Aptian is an age in the geologic timescale or a stage in the stratigraphic column. It is a subdivision of the Early or Lower Cretaceous Epoch or Series and encompasses the time from 121.4 ± 1.0 Ma to 113.0 ± 1.0 Ma (million years ago), a .... References External links * Crabs Aptian first appearances Taxa named by Henri Milne-Edwards Arthropod superfamilies Extant Aptian first appearances {{crab-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Matutidae Matutidae is a family of crabs, sometimes called ''moon crabs'', adapted for swimming or digging. They differ from the swimming crabs of the family Portunidae in that all five pairs of legs are flattened, rather than just the last pair, as in Portunidae. Crabs in the Matutidae are aggressive predators. Taxonomy Traditionally, this taxon contained the single genus ''Matuta'', and was considered a subfamily of the Calappidae. Now, the group is ranked as a family and six genera (four extant and two fossil) are now recognised. Although placed in the Calappoidea, it is not clear that Matutidae and Calappidae are closely related. ''Ashtoret'' Galil & P. F. Clark, 1994 † '' Eomatuta'' De Angeli & Marchiori, 2009 ''Izanami'' Galil & P. F. Clark, 1994 ''Matuta'' Weber, 1795 ''Mebeli'' Galil & P. F. Clark, 1994 † '' Szaboa'' Müller & Galil, 1998 Image:Ashtoret picta (photo Miguel Ramirez).jpg, ''Ashtoret picta'' Image:Specimen of Izanami curtispina.JPG, ''Izanami curtispina'' I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	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]
picture info	Crabs 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]
	Calappa Japonica ''Calappa japonica'', also known as the Japanese shame-faced crab, is a marine species of box crab in the family Calappidae. Originally found in the waters around Japan, more recently it has been found in Africa, the Red Sea and Western Australia. Description ''Calappa japonica'' is a large crab, and has a yellow and red colouration. The length of carapace is approximately .65 times the width, with a tuberculated surface. Seven sharp teeth are located around the margins of each clypeiform expansion. Distribution and habitat This species was first discovered in Tokyo Bay, Japan. It is now known to occur in regions as far away as Africa and Western Australia, and lives in waters up to deep. as well as being found in the Red Sea. Behaviour and diet This crab is a predator, and feeds on invertebrates such as other crabs, as well as oysters and snails. It has a specially adapted right pincer which it uses to break open snail's shells. There is a large accessory tooth located at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]