Perognathus Wied-Neuwied, 1839 . Nova Acta Phys.-Med. Acad. Caes. Leop.-Carol., 19(1):368.

TYPE SPECIES: Perognathus fasciatus Wied-Neuwied, 1839 .

SYNONYMS: Abromys Gray, Cricetodipus Peale, Otognosis Coues.

COMMENTS: Revised by Merriam (1889) and Osgood (1900), who also included those species listed here for Chaetodipus . Chromosomal relationships reviewed by Patton (1967b) and Williams (1978a).