Historically in a spring at Muscle Shoals, Alabama, but not collected there since impoundment of Tennessee River (Mirarchi, 2004). The type locality is Shoal Creek in Lauderdale Co., Alabama (collected pre 1896 and again in 1906- see Hinkley, 1906), destroyed by construction of the Wilson Dam. Hubricht (1960) recorded it from near the Little Salkehatchie River north of Ehrhardt, Bamberg Co., South Carolina.