Crayfish are so cool! But I can't find a narrow enough field guide that will cover them all. This one time when I was in Smoky Mountains I saw this bright orange-red one, it was literally as bright as a cartoon! I wonder what kind it was.
2006-07-07 23:23:29 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Zoology
Oh my, 250 species just in the South?! I'll never be able to identify them!
2006-07-07 23:40:02 · update #1
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 [1]. 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.
The greatest diversity of crayfish species is found in south-eastern North America, with over 250 species in nine genera, all in the family Cambaridae. A further genus of astacid crayfish is found in the Pacific Northwest and the headwaters of some rivers east of the Continental Divide.
2006-07-07 23:30:26 · answer #1 · answered by sunshine25 7 · 3⤊ 1⤋
Google "types of crayfish"
2006-07-07 23:28:15 · answer #2 · answered by lampoilman 5 · 0⤊ 0⤋