Length 2 3/4 – 4 in. (7-10 cm). Although easily confused with its close cousin the Northern Dusky Salamander, the Mountain Dusky Salamander has a rounded rather than a wedge-shaped tail. Also, look for the light tan or brownish stripe down the back, bordered on either side by a black or very dark brown line. Often there is a row of dark V-shaped spots running down the center of the back. Older specimens may be very dark and lack any pattern whatsoever. Although they are reported to be somewhat more land-dwelling than most other species of dusky salamanders, they are normally found in the same habitat as the Northern Dusky and the Northern Two-lined Salamanders. In Ohio, Allegheny Mountain Dusky Salamanders are restricted to the extreme northeastern corner of the state.
Text courtesy of the Ohio Division of Wildlife: https://wildlife.ohiodnr.gov/portals/wildlife/pdfs/publications/id%20guides/pub348.pdf