Peromyscus guatemalensis Merriam, 1898 . Proc. Biol. Soc. Washington, 12:118.

TYPE LOCALITY: Guatemala, Huehuetenango, Todos Santos, 10,000 ft .

DISTRIBUTION: Intermediate to high elevations in mountains of S Chiapas, Mexico, and SW Guatemala.

SYNONYMS: altilaneus .

COMMENTS: Morphological variation and distribution clarified by Huckaby (1980). Level of relationship to morphologically similar allopatric forms P. grandis and P. zarhynchus unresolved. Status of altilaneus problematic: synonymized under guatemalensis by Huckaby (1980; also see Carleton and Huckaby, 1975) but listed as a species by Hall (1981), who followed Osgood (1909). Carleton (1989) noted cranial resemblance of altilaneus to P. mexicanus . P. mexicanus species group.