1. Quite a while prior, the Tocantins River Basin was occupied by a few indigenous clans of South America, including the Tocantin, Guaraju, Apinage, Inhaiguara, and others

2. Hoplias Aimara occurs in the drainages of Rio Tocantins, Rio Xingu, Rio Tapaj6s, Rio Jari, and Rio Trombetas, in coastal drainages of the Guyanas, Suriname, and state of Amapa, Brazil