This species is endemic to lower south-eastern USA (Alabama, Florida, Georgia). This species is known from watersheds of upper Choctawhatchee River in Alabama; upper Apalachicola River, upper Ochlockonee River and lower Chipola River in Florida; and Chattahoochee River and lower Flint River in Georgia. Lower Chattahoochee River drainage basin from the Fall Line at Columbus, Georgia, south to the northern edge of the Dougherty Plain physiographic region of Georgia and Alabama to about the Miller-Early county line in Georgia; abundant in ravines along the eastern valley wall of the Apalachicola River downriver from the town of Chattahoochee, Florida, to Outside Lake near the town of Estiffanulga; ranges to about 50km upstream from Chattahoochee along the Pelham Escarpment; common in ravines along the Ochlockonee River and its two major tributaries, Little River and Telogia Creek, in the Tallahassee Red Hills of Florida; a few populations are known from the lower Chipola River in ravines above its confluence with the Apalachicola River (Means 1993). Populations probably occur in most/all suitable microhabitats within the range. See Means and Karlin (1989) for further details and map.