title: First record of giant anteater (xenarthra, myrmecophagidae) in north america.
abstract: A right metacarpal III represents the first North American record of the giant anteater (Myrmecophaga tridactyla). Recovered in northwestern Sonora, Mexico, with a rich vertebrate fauna of early Pleistocene (Irvingtonian) age, it belongs to a cohort of large mammals that dispersed from South America to North America along a savanna corridor. Presumably habitat and climatic changes have subsequently driven this mammalian family more than 3000 kilometers back into Central America from its former expansion into temperate North America.
authors.forename: C A
authors.initials: CA
authors.lastname: Shaw
authors.forename: H G
authors.initials: HG
authors.lastname: McDonald