DistributionRead full entry
Range DescriptionThis species occurs in the United States of America in Alabama, Indiana, Michigan, New York, Ohio and Pennsylvania (NatureServe 2009). It is also found in Ontario, Canada (NatureServe 2009). It is widespread in the Ohio River drainage, from headwaters in western New York and Pennsylvania downstream to near the mouth of the Ohio River (Williams et al. 2008). This species is known in the upper Tennessee River drainage of southwestern Virginia and eastern Tennessee, as well as upper reaches of the Elk River (Williams et al. 2008).
From the total number of streams where this species was historically found, this species is now known in only 22% (extant in 22 streams and a lake currently compared to 106 water bodies historically, = 78% decline) (Butler 2002). This species is no longer found in 'hundreds of miles' of the main sections of the Maumee, Ohio, Wabash, and Tennessee Rivers, as well as the tributaries of these rivers (Butler 2002). This species has been extirpated from several states, including Illinois, Kentucky, Tennessee, Virginia, and West Virginia, which is half of the states that it was previously recorded as extant in (Butler 2002).