"According to Eurico Miller (1983), who conducted pioneering archaeological research on the middle-upper Guaporé, the Tupi of the Guaporé originated from the dispersion of Tupi families coming from the Aripuanã. In the plateau area of the upper-middle Guaporé, groups of pottery-making agriculturists reached the shores of the river and its affluents around AD 900. These groups would have spoken languages from the Tupari family of the Tupi trunk. ... " - https://pib.socioambiental.org/en/Povo:Aru%C3%A1, 17.08.2019
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