IUCN threat status:

Data Deficient (DD)

Distribution

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Range Description

This species is known from the upper Guyandotte River and Bluestone River drainages of West Virginia; the upper Big Sandy drainage in Buchanan and Dickerson counties, Virginia; in Floyd and Pike counties, Kentucky, USA. Occurrences in Levisa Fork and Knox Creek on the Tug Fork River are disjunct from the remaining populations (T. Jones and R. Thoma pers. comm. 2009). Special efforts have been made to collect this species from adjacent streams in neighbouring counties but to no avail (Jezerinac et al. 1995). The species has lost half of its distribution in Virginia, is near extirpation in West Virginia, and occupies a small portion of the Russell Fork mainstem in Kentucky (R. Thoma pers. comm. 2009). The extent of occurrence (EOO) of this species is approximately 3,300 km2.
This species has been searched for every year since 2000 in West Virginia without success, including intensive survey effort based on habitat suitability modeling (Channell 2004). In Kentucky, it is known only from the upper portions of the Big Sandy River drainage in Floyd and Pike counties and a single collection from the Red River in Estill County (Kentucky River drainage) exists in the EKU Crayfish Collection, although subsequent surveys have not found the species here (Taylor and Schuster, 2004). Recent field work in Kentucky found the species to occur in both Tug Fork (Pike County) and Levisa Fork (Floyd County) of the Big Sandy drainage; this now makes only seven confirmed sites in Kentucky, however, more field work may find more (J. Cordeiro pers. comm. 2010). This species has lost half of its distribution in Virginia, is near extirpation in West Virginia, and still occupies a small portion of the Russell Fork mainstem in Kentucky (R. Thoma, pers. comm., 2009).

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© International Union for Conservation of Nature and Natural Resources

Source: IUCN

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