Reithrodontomys spectabilis Jones and Lawlor, 1965 . Univ. Kansas Pubi., Mus. Nat. Hist., 16:413.

TYPE LOCALITY: Mexico, Quintana Roo, Isla Cozumel, 2.5 km N San Miguel .

DISTRIBUTION: Restricted to Cozumel Island, Mexico.

COMMENTS: Subgenus Aporodon, mexicanus species group. A large insular species, perhaps sharing common ancestry with R. gracilis (Jones and Lawlor, 1965) . See Jones (1982, Mammalian Species, 193).