Range Extent CommentsDisjunct populations in upper Red Cedar River system, northern Wisconsin; Mississippi River tributaries in southeastern Minnesota, eastern Iowa, southern Wisconsin, and northern Illinois; Ozark Mountain drainages (Mississippi, Missouri, White, and Arkansas river drainages) in southern Missouri, southeastern Kansas, northern Arkansas, and northeastern Oklahoma; and Boggy Creek system, Oklahoma (possibly extirpated); common, locally abundant, in south; uncommon in north (Page and Burr 1991).