Reithrodontomys megalotis (Baird, 1858)

Guy G. Musser & Michael D. Carleton, 1993, Order Rodentia - Family Muridae, Mammal Species of the World (2 nd Edition), Washington and London: Smithsonian Institution Press, pp. 501-755 : 741

Reithrodontomys megalotis (Baird, 1858) . Mammalia in Repts. U.S. Expl. Surv., 8(1):451.

TYPE LOCALITY: Mexico-USA boundary region, between Janos, Chihuahua, and San Luis Springs, Grant Co., New Mexico .

DISTRIBUTION: SC British Columbia and SE Alberta, Canada; W and NC USA; south to N Baja California and through interior Mexico to central Oaxaca.

SYNONYMS: alticolus , amoles , arizonensis , aztecus , caryi, catalinae , cinereus , deserti , distichlis, dychei , hooperi , klamathensis, limicola, longicaudus , nebrascensis, nigrescens , pallidus , pectoralis , peninsulae , ravus , santacruzae, saturatus , sestinensis.

COMMENTS: Subgenus Reithrodontomys , megalotis species group. Formerly included R. zacatecae , which Hood et al. (1984) identified as a separate species. The substantial chromosomal variation reported (see Engstrom et al., 1981) cautions that other species may be lumped under R. megalotis . See Webster and Jones (1982a, Mammalian Species, 167).