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These so called "Sundadonts", doesn´t have a developed epicantic eye fold, in contrast to "Sinodonts". In addition to Ainus, and as showed in the map, apparently sundadonts also includes Thais and Cambodians, and many of them doesn´t have a "sinoid" eyefold, although they are today (I think) considerably mixed with sinoids.
Sundadonts are somewhat similar to Amerindians / Native Americans.
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