| White-Spotted Slimy Salamander
Plethodon cylindraceus (Harlan, 1825)
- Powell, Collins and Hooper (1998 A Key to the Amphibians and Reptiles of the Continental United States and Canada. University Press of Kansas, Lawremce. vi + 131 pp.) recognized this evolutionary lineage as a distinct species.
- Duellman and Sweet (1999 pages 31-109 In Duellman, W. E. (editor), Patterns of Distribution of Amphibians. A Global Perspective. Johns Hopkins University Press, Baltimore. viii + 633 pp.) recognized this evolutionary lineage as a distinct species.