The Tapayuna (autonym: Kajkwakratxi), also known as Tapayúna, Western Suyá and Beiço-de-Pau are an indigenous people native to the state of Mato Grosso, Brazil.
[2][3][1] The Tapayuna historically lived on the Arinos River, in the Tapajós basin, between Juruena and Aripuanã.
[4]: 34–5 They were decimated in mid-20th century as a result of numerous conflicts with Brazilian settlers, rubber tappers, and ranchers; it is estimated that their population declined 90% until reaching 41 individuals in 1969,[4]: 36–40 [5][6]: 9 which has been characterized as an ethnocide.
[4]: 37–38 The surviving Tapayúna were then transferred to Xingu Indigenous Park at some point between 1969 and 1970, resulting in 10 more deaths.
[4]: 41–2 Later, many Tapayúna moved to Terra Indígena Capoto-Jarina, where they went on to live with the Mẽtyktire subgroup of the Kayapó people, speakers of another Northern Jê language, Mẽbêngôkre.