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{{Short description|Genus of crabs}} |
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| image = Cancergracilis.jpg |
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| fossil_range = {{fossil_range|Oligocene|Recent}} |
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| regnum = [[Animal]]ia |
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| image =Cancer magister (James Dwight Dana).jpg |
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| phylum = [[Arthropod]]a |
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| subphylum = [[Crustacean|Crustacea]] |
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| classis = [[Malacostraca]] |
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| ordo = [[Decapoda]] |
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| type_species_authority = [[James Dwight Dana|Dana]], 1852 |
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| infraordo = [[Crab|Brachyura]] |
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| familia = [[Cancridae]] |
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| ⚫ | | genus_authority = [[Alphonse Milne-Edwards|A. Milne-Edwards]], 1862 |
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| subdivision_ranks = Species |
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| subdivision = |
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*''[[Metacarcinus gracilis]]'' |
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*''[[Dungeness crab|Metacarcinus magister]]'' |
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*''[[Metacarcinus novaezelandiae]]'' |
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}} |
}} |
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'''''Metacarcinus''''' is a genus of [[crab]]s formerly included in the genus ''[[Cancer (genus)|Cancer]]''.<ref name="Ng">{{cite journal |journal=[[Raffles Bulletin of Zoology]] |year=2008 |volume= |
'''''Metacarcinus''''' is a genus of [[crab]]s formerly included in the genus ''[[Cancer (genus)|Cancer]]''.<ref name="Ng">{{cite journal |journal=[[Raffles Bulletin of Zoology]] |year=2008 |volume=17 |pages=1–286 |title=Systema Brachyurorum: Part I. An annotated checklist of extant Brachyuran crabs of the world |author=P. K. L. Ng, D. Guinot & P. J. F. Davie |url=http://rmbr.nus.edu.sg/rbz/biblio/s17/s17rbz.pdf}}</ref> The [[monophyly]] of this genus was not supported by a [[molecular phylogenetics|molecular study]] using the [[Cytochrome c oxidase|cytochrome oxidase I]] gene.<ref>{{cite journal |author=Michelle K. Harrison and Bernard J. Crespi |year=1999 |title=Phylogenetics of ''Cancer'' Crabs (Crustacea: Decapoda: Brachyura) |journal=[[Molecular Phylogenetics and Evolution]] |volume=12 |pages=186–199 |url=http://decapoda.arthroinfo.org/pdfs/4160/4160.pdf |format=[[Portable Document Format|PDF]] |doi=10.1006/mpev.1998.0608 |pmid=10381321}}</ref> |
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==Description== |
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''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 sharp spines or grained or smooth keel. On the external surface of the propodite there are usually 4 balls. The cutting edges of the pliers' fingers of the claw have sharp teeth. The fixed finger has two points: middle and on the bottom edge. |
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==Extant species== |
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Included species:<ref name="SandF2000">{{cite journal |author1=Carrie E. Schweitzer |author2=Rodney M. Feldmann |name-list-style=amp |year=2000 |title=Re-evaluation of the Cancridae Latreille, 1802 (Decapoda: Brachyura) including three new genera and three new species |journal=[[Contributions to Zoology]] |volume=69 |issue=4 |pages=223–250 |doi=10.1163/18759866-06904002 |url=http://dpc.uba.uva.nl/ctz/vol69/nr04/art02 |access-date=2010-10-17 |archive-url=https://archive.today/20121209003405/http://dpc.uba.uva.nl/ctz/vol69/nr04/art02 |archive-date=2012-12-09 |url-status=dead |doi-access=free }} Also available as [http://decapoda.nhm.org/pdfs/10785/10785.pdf PDF].</ref> |
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{| class="wikitable" |
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! Image !! Scientific name!! Common Name !! Distribution |
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|[[File:Canceranthonyi.jpg|120px]] || ''[[Metacarcinus anthonyi]]'' ||yellow rock crab or yellow crab || Pacific coast of North America |
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|[[File:Cancer edwardsii -Jaiba marmola Valpo f1.2.jpg|120px]] || ''[[Metacarcinus edwardsii]]'' || mola rock crab, southern rock crab, or Chilean rock crab|| Pacific coast between Guayaquil in Ecuador and the Beagle Channel in the southernmost Chile |
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|[[File:Metacarcinus gracilis.jpg|120px]] || ''[[Metacarcinus gracilis]]'' ||graceful rock crab or slender crab || from Alaska to Bahía Magdelena, Baja California |
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|[[File:Dungeness Crab - Flickr - brewbooks.jpg|120px]] || ''[[Dungeness crab|Metacarcinus magister]]'' ||Dungeness crab || west coast of North America |
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|[[File:Pie Crust Crab.jpg|120px]] || ''[[Metacarcinus novaezelandiae]]'' ||Pie crust crab || New Zealand and south-eastern Australia. |
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==Fossils== |
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*† ''[[Metacarcinus danai]]'' (Miocene, California) |
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*† ''[[Metacarcinus davidi]]'' (Miocene to Pliocene, California) |
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*† ''[[Metacarcinus jenniferae]]'' (Middle Pliocene, California) |
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*† ''[[Metacarcinus minutoserratus]]'' (Pliocene, Japan) |
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*† ''[[Metacarcinus starri]]'' (Early Oligocene, Washington) |
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==References== |
==References== |
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{{ |
{{reflist|2}} |
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==External links== |
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*{{Commons category-inline|Metacarcinus|''Metacarcinus''}} |
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{{Taxonbar|from=Q6822374}} |
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[[Category:Cancroidea]] |
[[Category:Cancroidea]] |
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[[Category:Decapod genera]] |
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[[Category:Extant Oligocene first appearances]] |
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[[Category:Taxa named by Alphonse Milne-Edwards]] |
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Greek: Ά ά Έ έ Ή ή Ί ί Ό ό Ύ ύ Ώ ώ Α α Β β Γ γ Δ δ Ε ε Ζ ζ Η η Θ θ Ι ι Κ κ Λ λ Μ μ Ν ν Ξ ξ Ο ο Π π Ρ ρ Σ σ ς Τ τ Υ υ Φ φ Χ χ Ψ ψ Ω ω {{Polytonic|}}
Cyrillic: А а Б б В в Г г Ґ ґ Ѓ ѓ Д д Ђ ђ Е е Ё ё Є є Ж ж З з Ѕ ѕ И и І і Ї ї Й й Ј ј К к Ќ ќ Л л Љ љ М м Н н Њ њ О о П п Р р С с Т т Ћ ћ У у Ў ў Ф ф Х х Ц ц Ч ч Џ џ Ш ш Щ щ Ъ ъ Ы ы Ь ь Э э Ю ю Я я ́
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