Geographical Distribution and Classification
Cambaridae: Procambarus alleni Parastacidae: Cherax sp.There are three families of crayfish, two in the Northern Hemisphere and one in the Southern Hemisphere. The Southern-Hemisphere (Gondwana-distributed) family Parastacidae lives in South America, Madagascar and Australasia, and is distinguished by the lack of the first pair of pleopods. Of the other two families, members of the Astacidae live in western Eurasia and western North America and members of the family Cambaridae live in eastern Asia and eastern North America.
Madagascar has an endemic genus, Astacoides, containing seven species.
Europe is home to seven species of crayfish in the genera Astacus and Austropotamobius.
Cambaroides is native to Japan and eastern mainland Asia.
Read more about this topic: Crayfish
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