This species is endemic to the Blood River drainage, an eastern flowing tributary of the Tennessee River on the border of Kentucky and Tennessee (Taylor and Sabaj 1998). In Tennessee it occurs in the Coastal Plain province in the Blood River system in Henry County (Williams and Bivens 2001). The Blood River is a relatively small tributary of the Tennessee River, with its headwaters originating in Henry County, Tennessee. Furthermore, within Kentucky, the Blood River drainage and the range of this species are contained entirely within the boundaries of Calloway County (Taylor and Schuster 2004). This species has estimated extent of occurrence of 1,200 kmÂ².