 The first records of European penetration to the Madeira River are from 1637, when Pedro Teixeira travelled from Belém to Quito in Ecuador.The municipality of Novo Aripuanã was created by state law 96 of 19 December 1955 from parts of the municipalities of Borba and Manicoré.It contained the district of Foz do Aripuanã with the sub-districts of Alvorada, Manicorezinho and Itapinima, and the district of Sumaúma with the sub-districts of Alvorada, Manicorezinho and Itapinima.