Taxonomic Revision of the Mexican Plethodontid Salamanders of the Genus Lineatriton, with the Description of Two New Species

We describe two new species of salamanders of the genus Lineatriton, which occur as allopatric populations in the Sierra de Juárez, Oaxaca, and the Sierra de Los Tuxtlas, Veracruz, Mexico. The name Lineatriton lineolus (Cope) is restricted to populations in the Sierra Madre Oriental of Veracruz. The population in the Sierra de Los Tuxtlas, previously allocated to L. lineolus, is here described as Lineatriton orchimelas. The population from the Sierra de Juárez is reported here for the first time and is described as yet another new species of Lineatriton. These new species differ from L. lineolus in aspects of body size, body proportions, and pigmentation of the male reproductive organs.