The Yokuts people traditionally occupied the San Joaquin Valley and foothills in the central part of California. The three divisions were the Northern Valley Yokuts, the Southern Valley Yokuts, and the Foothill Yokuts. Contemporary Yokuts tribes include the Choinumni, Gashowu, Lakisamni, the Chukchansi, the Tachi, Chaushila (Chowchilla), and the Wukchumni. The Yokutsan languages are of the Penutian family. Their diets consisted of king salmon along the major rivers, with a mixed resource base of fish, vegetable foods, and game in valleys with lesser tributaries. In the foothills, acorns were the principal food source, with other vegetable foods and game playing a secondary role. In the early 18th century, there were between 18,000 and 50,000 Yokuts, one of the highest regional population densities in aboriginal North America. Today there are some 2,000 Yokuts living on the Picayune, Santa Rosa, and Table Mountain rancherias, and on the Tule River Reservation. There are about 600 more Yokuts in two tribes which are not federally recognized, and others scattered around California. (Sources: "American Indian Studies" LibGuide, and others.) Yokuts were previously known as Mariposans.