A member of the camel family (Camelidae) found only in South America. The llama is an artiodactyl, or even-toed ungulate, with two toes on each foot. The upper lip is cleft and prehensile. The animal has a long neck, and attains a maximum length of less than 8 ft (2.4 m) and a maximum weight of nearly 300 lb (135 kg; see illus.). A single young is born after a gestation period of about 11 months. The maximum life-span is about 20 years. Like other members of the family, the llama is herbivorous. It has 36 teeth with the dental formula I 1/3 C 1/1 Pm 3/3 M 3/3. These animals lack a gallbladder. Many interesting crosses have occurred among the different breeds in South America (see table).