Hyas (genus)
Encyclopedia
Hyas is a genus
Genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 of oregoniid
Oregoniidae
Oregoniidae is a family of crabs, formerly included in the family Majidae. It contains the four genera Chionoecetes, Hyas, Macroregonia and Oregonia....

 crab
Crab
True crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting "tail" , or where the reduced abdomen is entirely hidden under the thorax...

s, comprising five extant species:
  • Hyas alutaceus Brandt, 1851
  • Hyas araneus (Linnaeus, 1758)
  • Hyas coarctatus Leach, 1815
  • Hyas lyratus Dana, 1851
  • Hyas ursinus Rathbun, 1924
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