These languages are classified into three groups: •
Numic • Central Numic languages •
Comanche •
Timbisha (a dialect chain with main regional varieties being Western, Central, and Eastern) •
Shoshoni (a dialect chain with main regional varieties being Western,
Gosiute, Northern, and Eastern) • Southern Numic languages •
Kawaiisu •
Colorado River (a dialect chain with main regional varieties being Chemehuevi, Southern Paiute, and
Ute) • Western Numic languages •
Mono (two main dialects: Eastern and Western) •
Northern Paiute (a dialect chain with main regional varieties being Southern Nevada, Northern Nevada, Oregon, and Bannock) Apart from
Comanche, each of these groups contains one language spoken in a small area in the southern
Sierra Nevada and valleys to the east (Mono, Timbisha, and Kawaiisu), and one language spoken in a much larger area extending to the north and east (Northern Paiute, Shoshoni, and Colorado River). Some
linguists have taken this pattern as an indication that Numic speaking peoples expanded quite recently from a small core, perhaps near the
Owens Valley, into their current range. This view is supported by
lexicostatistical studies. Fowler's reconstruction of Proto-Numic ethnobiology also points to the southern Sierra Nevada as the homeland of Proto-Numic approximately two millennia ago. A
mitochondrial DNA study from 2001 supports this linguistic hypothesis. The anthropologist Peter N. Jones thinks this evidence is circumstantial nature, but this is a distinctly minority opinion among specialists in Numic. David Shaul has proposed that the Southern Numic languages spread eastward long before the Central and Western Numic languages expanded into the Great Basin. Bands of eastern Shoshoni split off from the main Shoshoni body in the very late 17th or very early 18th century and moved southeastward onto the Great Plains. Changes in their Shoshoni dialect eventually produced Comanche. The Comanche language and the Shoshoni language are quite similar, although certain low-level consonant changes in Comanche have inhibited mutual intelligibility. Recent lexical and grammatical diffusion studies in Western Numic have shown that while there are clear linguistic changes that separate Northern Paiute as a distinct variety, there are no unique linguistic changes that mark Mono as a distinct variety. == Major sound changes ==