This species formerly was limited to specific stretches of the Duck River, Tennessee (most recently Bedford to Humphreys Cos.); it can no longer be found from the Caney Fork where formerly it occurred near the mouth (Burch 1989) in Smith Co., though it may be in deep water of Cumberland (Bogan and Parmalee 1983). Currently it is likely to be extinct as it has not been seen in in more than twenty years. It was endemic to Caney Fork but the population was destroyed by USACE Center Hill dam on Caney Fork. Recently, specimens were possibly found by Dillon and Johnson (2004), although R. Minton (pers. comm. 2009) believes this species is extinct and that the individuals recorded were of a different taxa, possibly armigera. Thus, taxonomic clarification of this species and the recently collected specimens is needed in order to resolve the Red List status of this species.
Burch (1989) cites forks of the Cumberland River; Caney Fork, Tennessee, near the mouth (from Goodrich, 1940) in Smith Co. Davis (1974) found it inhabiting the Duck River from Bedford to Humphreys Co. The Caney Fork population has long been extirpated and the Duck River population was the last to disappear (Bogan and Parmalee 1983). The taxonomic status of recently collected specimens needs evaluation (Dillon and Johnson 2004).
