Sidwell (2009a), in a lexicostatistical comparison of 36 languages which are well-known enough to exclude loan words, finds little evidence for internal branching, though he did find an area of increased contact between the Bahnaric and Katuic languages, such that languages of all branches apart from the geographically distant Munda and Nicobarese show greater similarity to Bahnaric and Katuic the closer they are to those branches, without any noticeable innovations common to Bahnaric and Katuic. He therefore takes the conservative view that the thirteen branches of Austro-Asiatic should be treated as equidistant on current evidence.
Итого 13 групп аустроазиатской семьи: Munda, Khasian, Khmuic, Pakanic, Palaungic, Vietic, Katuic, Bahnaric, Khmer, Pearic, Nicobarese, Aslian, Monic. Плюс к этому, возможно, Sidwell & Blench (2011) suggest Shompen as an additional branch.
Слишком большое разнообразие этой семьи в Индокитае так-таки ни о чём не говорит?
