The muscular salamander (Pseudoeurycea papenfussi), also known commonly as la salamandra escaladora in Mexican Spanish, is a species of salamander in the family Plethodontidae. The species is endemic to Mexico.

Etymology The specific name, papenfussi, is in honor of American herpetologist Theodore Johnstone Papenfuss. xiii + 244 pp.

Habitat The preferred natural habitats of Pseudoeurycea papenfussi are subtropical or tropical dry forests and rocky areas, at elevations of .

Conservation status Pseudoeurycea papenfussi is threatened by habitat loss.

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