Bhavan identifies Northeast India Mongoloids to be a subrace called the "Paleo-Mongoloid", being the "dominant element in the tribes living in Assam and the Indo-Burmese frontiers... Sikkim, Mizoram, Bhutan, Nepal... [and] Tibetan mongoloids"
In 1900, Joseph Deniker said, the "Mongol race admits two varieties or subraces: Tunguse or Northern Mongolian... and Southern Mongolian" The people of East Asia are called "Northern Mongoloids". Archaeologist Peter Bellwood claims that the "vast majority" of people in Southeast Asia, the region he calls the "clinal Mongoloid-Australoid zone", are "Southern Mongoloids" but have a "high degree" of Australoid admixture.  Ainus are considered Southern Mongoloids even though they live in East Asia. Sinodonty and Sundadonty are dentition patterns that correspond to the Northern Mongoloid vs. Southern Mongoloid distinction.
The physical features of the "Proto-Mongoloid" were characterized as, "a straight-haired type, medium in complexion, jaw protrusion, nose-breadth, and inclining probably to round-headedness". Kanzō Umehara considers the Ainu and Ryukyuans to have "preserved their proto-Mongoloid traits".