Budin's tuco-tuco (Ctenomys budini) was formerly considered a species of rodent in the family Ctenomyidae.[2] It is endemic to southeast Jujuy Province in northwest Argentina.[2] Given the extensive human presence in its limited range, it has been suspected to be threatened.[1] The IUCN currently views it as a subspecies of C. frater.[3] It was named after Emilio Budin, an Argentine specimen collector who worked with Oldfield Thomas.[4]