The range of Procambarus (Girardiella) gracilis (Bundy) runs in a fairly narrow band southwest of Wisconsin through Illinois, Iowa, Missouri and Arkansas to the eastern edges of Nebraska, Kansas, Oklahoma and Texas. It extends into Wisconsin only in the southeastern corner of the state, having been previously reported only as far north as Milwaukee County. Within this range Hobbs and Rewolinski (1985) have described its habitat to be regions that were originally prairies.
Jass, J.P. 1987. Range extension for burrowing crayfish Procambarus (girardiella) gracilis (Bundy). Field Station Bulletin 20(1): 1-2