Kepiting: Perbedaan antara revisi

 

About 850 species&nbsp;<ref>{{cite journal | quotes=no |author=Sternberg, R. von & N. Cumberlidge |year=2001 |title=On the heterotreme-thoracotreme distinction in the Eubrachyura De Saint Laurent, 1980 (Decapoda: Brachyura) |journal=[[Crustaceana]] |volume=74 |pages=321–338}}</ref> of crab are freshwater or (semi-)terrestrial species; they are found throughout the world's [[tropic]]al and [[Subtropics|semi-tropical]] regions. They were previously thought to be a closely related group, but are now believed to represent at least two distinct [[Lineage (evolution)|lineages]], one in the [[Old World]] and one in the [[New World]]&nbsp;<ref>{{cite journal | quotes=no |author=Sternberg, R. von, N. Cumberlidge & G. Rodriguez |year=1999 |title=On the marine sister groups of the freshwater crabs (Crustacea: Decapoda: Brachyura) |journal=[[J. Zool. Syst. Evol. Research]] |volume=37 |pages=19–38}}</ref>.

<gallery>

Berkas:Corystes cassivelaunus.jpg|[[Masked crab]], ''Corystes cassivelaunus''

Berkas:Hepatus epheliticus.jpg|''Hepatus epheliticus'', a calico crab

</gallery>

==Similar animals==

Several other groups of animals are either called crabs or have the term "crab" in their names. These include [[hermit crab]]s, [[porcelain crab]]s and [[king crab]]s, which, despite superficial similarities to true crabs, belong to the [[Anomura]]. The [[United Kingdom|UK]] [[Food Standards Agency]] allows [[king crab]]s to be sold as "crab"&nbsp;<ref>{{cite web |url=http://www.food.gov.uk/multimedia/webpage/namesoffish |title=UK list of legal names for fish species |publisher=[[Food Standards Agency]] |date=[[2003-09-26]]}}</ref>, but this practice is not followed outside the [[food industry]]. Others, such as [[horseshoe crab]]s are much more distantly related. Anomuran "crabs" can be distinguished from true crabs by counting the legs. In Anomura, the last pair of [[pereiopod]]s (walking legs) is hidden inside the [[carapace]], so only four pairs are visible (counting the claws), whereas uninjured true crabs generally have five visible pairs (in the family Hexapodidae, the last pair of pereiopods is [[Vestigial structure|vestigial]]&nbsp;<ref>{{cite journal |quotes=no |title=Rediscovery of the holotype of ''Paeduma cylindraceum'' (Bell, 1859) and description of a new genus of Hexapodidae (Decapoda, Brachyura) |author=Guinot, D. |journal=[[Zoosystema]] |volume=28 |issue=2 |pages=553–571 |year=2006 |url=http://www.mnhn.fr/museum/front/medias/publication/8150_z06n2a26.pdf |format=[[Portable Document Format|PDF]]}}</ref>).-->

 

{{commonscat|Brachyura}}

{{Wikispecies|Brachyura}}

 

[[Kategori:Hewan]]