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Metacarcinus
''Metacarcinus'' is a genus of crabs formerly included in the genus ''Cancer''. It includes nine exclusively fossil species and five extant species, of which four are also known from the fossil record. A molecular study using the cytochrome oxidase I gene does not support the monophyly of this genus. Description ''Metacarcinus'' crabs have an oval carapace of about ⅔ of its largest width, with a surface with poorly marked division of smooth or gently colored regions. The front edge usually does not protrude before orbital, and the total length of these edges is 26–34% of the largest width of the carapace, with 5 spikes, including inner orbits, of which the middle springs lower than the others. 9–10 spikes are located on both anteroposterior lateral sides of the carapace; they can be of different shapes. The lateral edges are edged and can have one spike. The claws propodite is characterized by an upper edge at an angle of about 120° to the distal edge, equipped with shar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metacarcinus Izumoensis
''Metacarcinus'' is a genus of crabs formerly included in the genus ''Cancer''. It includes nine exclusively fossil species and five extant species, of which four are also known from the fossil record. A molecular study using the cytochrome oxidase I gene does not support the monophyly of this genus. Description ''Metacarcinus'' crabs have an oval carapace of about ⅔ of its largest width, with a surface with poorly marked division of smooth or gently colored regions. The front edge usually does not protrude before orbital, and the total length of these edges is 26–34% of the largest width of the carapace, with 5 spikes, including inner orbits, of which the middle springs lower than the others. 9–10 spikes are located on both anteroposterior lateral sides of the carapace; they can be of different shapes. The lateral edges are edged and can have one spike. The claws propodite is characterized by an upper edge at an angle of about 120° to the distal edge, equipped with sha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metacarcinus Davidi
''Metacarcinus'' is a genus of crabs formerly included in the genus ''Cancer''. It includes nine exclusively fossil species and five extant species, of which four are also known from the fossil record. A molecular study using the cytochrome oxidase I gene does not support the monophyly of this genus. Description ''Metacarcinus'' crabs have an oval carapace of about ⅔ of its largest width, with a surface with poorly marked division of smooth or gently colored regions. The front edge usually does not protrude before orbital, and the total length of these edges is 26–34% of the largest width of the carapace, with 5 spikes, including inner orbits, of which the middle springs lower than the others. 9–10 spikes are located on both anteroposterior lateral sides of the carapace; they can be of different shapes. The lateral edges are edged and can have one spike. The claws propodite is characterized by an upper edge at an angle of about 120° to the distal edge, equipped with sha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metacarcinus Novaezelandiae
''Metacarcinus'' is a genus of crabs formerly included in the genus ''Cancer''. It includes nine exclusively fossil species and five extant species, of which four are also known from the fossil record. A molecular study using the cytochrome oxidase I gene does not support the monophyly In cladistics for a group of organisms, monophyly is the condition of being a clade—that is, a group of taxa composed only of a common ancestor (or more precisely an ancestral population) and all of its lineal descendants. Monophyletic gro ... of this genus. Description ''Metacarcinus'' crabs have an oval carapace of about ⅔ of its largest width, with a surface with poorly marked division of smooth or gently colored regions. The front edge usually does not protrude before orbital, and the total length of these edges is 26–34% of the largest width of the carapace, with 5 spikes, including inner orbits, of which the middle springs lower than the others. 9–10 spikes are located on b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metacarcinus Minutoserratus
''Metacarcinus'' is a genus of crabs formerly included in the genus ''Cancer''. It includes nine exclusively fossil species and five extant species, of which four are also known from the fossil record. A molecular study using the cytochrome oxidase I gene does not support the monophyly of this genus. Description ''Metacarcinus'' crabs have an oval carapace of about ⅔ of its largest width, with a surface with poorly marked division of smooth or gently colored regions. The front edge usually does not protrude before orbital, and the total length of these edges is 26–34% of the largest width of the carapace, with 5 spikes, including inner orbits, of which the middle springs lower than the others. 9–10 spikes are located on both anteroposterior lateral sides of the carapace; they can be of different shapes. The lateral edges are edged and can have one spike. The claws propodite is characterized by an upper edge at an angle of about 120° to the distal edge, equipped with sha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metacarcinus Jenniferae
''Metacarcinus'' is a genus of crabs formerly included in the genus ''Cancer''. It includes nine exclusively fossil species and five extant species, of which four are also known from the fossil record. A molecular study using the cytochrome oxidase I gene does not support the monophyly of this genus. Description ''Metacarcinus'' crabs have an oval carapace of about ⅔ of its largest width, with a surface with poorly marked division of smooth or gently colored regions. The front edge usually does not protrude before orbital, and the total length of these edges is 26–34% of the largest width of the carapace, with 5 spikes, including inner orbits, of which the middle springs lower than the others. 9–10 spikes are located on both anteroposterior lateral sides of the carapace; they can be of different shapes. The lateral edges are edged and can have one spike. The claws propodite is characterized by an upper edge at an angle of about 120° to the distal edge, equipped with sha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metacarcinus Danai
''Metacarcinus'' is a genus of crabs formerly included in the genus ''Cancer''. It includes nine exclusively fossil species and five extant species, of which four are also known from the fossil record. A molecular study using the cytochrome oxidase I gene does not support the monophyly of this genus. Description ''Metacarcinus'' crabs have an oval carapace of about ⅔ of its largest width, with a surface with poorly marked division of smooth or gently colored regions. The front edge usually does not protrude before orbital, and the total length of these edges is 26–34% of the largest width of the carapace, with 5 spikes, including inner orbits, of which the middle springs lower than the others. 9–10 spikes are located on both anteroposterior lateral sides of the carapace; they can be of different shapes. The lateral edges are edged and can have one spike. The claws propodite is characterized by an upper edge at an angle of about 120° to the distal edge, equipped with sha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metacarcinus Goederti
''Metacarcinus'' is a genus of crabs formerly included in the genus ''Cancer''. It includes nine exclusively fossil species and five extant species, of which four are also known from the fossil record. A molecular study using the cytochrome oxidase I gene does not support the monophyly of this genus. Description ''Metacarcinus'' crabs have an oval carapace of about ⅔ of its largest width, with a surface with poorly marked division of smooth or gently colored regions. The front edge usually does not protrude before orbital, and the total length of these edges is 26–34% of the largest width of the carapace, with 5 spikes, including inner orbits, of which the middle springs lower than the others. 9–10 spikes are located on both anteroposterior lateral sides of the carapace; they can be of different shapes. The lateral edges are edged and can have one spike. The claws propodite is characterized by an upper edge at an angle of about 120° to the distal edge, equipped with sha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metacarcinus Anthonyi
''Metacarcinus anthonyi'', the yellow rock crab or yellow crab, is a species of edible crab native to the Pacific coast of North America. Distribution ''Metacarcinus anthonyi'' occurs from Magdalena Bay, Baja California north to Humboldt Bay in Northern California, although it is uncommon further north than San Pedro. It lives in rocky areas at depths of up to . Only the juveniles live in the intertidal zone. Some fossils of ''M. anthonyi'' are also known from central and southern California, dating from the Pliocene and Pleistocene. Description Male yellow rock crabs can reach 165 mm carapace width, while females reach 148 mm. The carapace is oval, fairly broad, and widest at the 9th of 10 forward-curving anterolateral teeth. Like other California Cancridae crabs, ''M. anthonyi'' has black-tipped claws. ''M. anthonyi'' can be distinguished from ''Romaleon antennarium'' by its lack of red spotting on its underside. ''M. anthonyi'' also tends not to decorate itself an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metacarcinus Starri
''Metacarcinus starri'' is an extinct species of crab in the family Cancridae, subfamily Cancrinae. The species is known solely from the early Miocene, Clallam Formation and the underlying Pysht Formation deposits on the Olympic Peninsula of Washington state, United States. History and classification The species is known from only the holotype female, number UWBM 92012, and five other specimens all of which are currently residing in the collections housed at the Burke Museum of Natural History and Culture in Seattle, Washington, USA. The type specimens were first studied by Ross E. Berglund and James L. Goedert. Berglund and Goedert's species description was published in the ''Journal of Paleontology'' in 1996. The specific epithet "''starri''" was coined by the authors in recognition of David Starr, who collected and donated one of the paratype specimens. When first described, ''M. starri'' was named ''Cancer (Metacarcinus) starri'' by Berglund and Goedert. In 1975, J. D ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metacarcinus Edwardsii
''Metacarcinus edwardsii'', sometimes known as mola rock crab, southern rock crab, or Chilean rock crab, is a species of crab from the Pacific coast of South America. Distribution ''Metacarcinus edwardsii'' is found along the Pacific coast between Guayaquil in Ecuador and the Beagle Channel in the southernmost Chile. Description Females reach functional maturity at carapace width , that is, 50% of females are egg-bearing at this size. Males reach functional maturity at slightly larger sizes. The largest male crabs measure about in carapace width. ''Metacarcinus edwardsii'' is univoltine Voltinism is a term used in biology to indicate the number of broods or generations of an organism in a year. The term is most often applied to insects, and is particularly in use in sericulture, where silkworm varieties vary in their voltinism. ..., with the mating season from October to January. Utilization In Chile, it is the most important commercially exploited crab, caught exclus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dungeness Crab
The Dungeness crab (''Metacarcinus magister'') is a species of crab inhabiting eelgrass beds and water bottoms along the west coast of North America. It typically grows to across the carapace and is a popular seafood. Its common name comes from Dungeness Spit, United States, which shelters a shallow bay inhabited by the crabs. Description The carapace widths of mature Dungeness crabs may reach 10 inches, or 25.4 centimeters, but are typically 6-7 inches, or approximately 15-18 centimeters. They are a popular delicacy, and are the most commercially important crab in the Pacific Northwest, as well as the western states generally. The annual Dungeness Crab and Seafood Festival is held in Port Angeles, Washington each October. Dungeness crabs have a wide, long, hard shell, which they must periodically moult to grow; this process is called ecdysis. They have five pairs of legs, which are similarly armoured, the foremost pair of which ends in claws the crab uses both as defense and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metacarcinus Gracilis
The graceful rock crab or slender crab, ''Metacarcinus gracilis'' (the naming convention recognized by WoRMS) or ''Cancer gracilis'' (the naming convention recognized by ITIS), is one of only two members of the genus ''Metacarcinus,'' recognized by WoRMS, whose chelae (claws) are white tipped, the other crab being ''M. magister'' (Dungeness crab). Both of these eastern Pacific crab species are recognized by ITIS as belonging to the much larger genus ''Cancer''. ''M. gracilis'' has been caught from Alaska to Bahía Magdelena, Baja California. Although ''M. gracilis'' is only found in the Pacific Ocean, it has cousins in the Atlantic Ocean. The genus ''Cancer'' (''sensu lato'') apparently evolved in the Pacific Ocean and later migrated to the Atlantic Ocean. Larvae and small juveniles of this species are often seen riding jellyfish, especially '' Phacellophora camtschatica''. The juvenile crabs steal food from the jellyfish and also clean off parasitic amphipods. Morphology Like th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
