Autana River References Autana River river, South America Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: Orinoco River/ Physiography of the OrinocoLlanos, and the Guayapo, Sipapo, Autana, and Cuao rivers from the Guiana Highlands. Read MoreLlanos, and the Guayapo, Sipapo, Autana, and Cuao rivers from the Guiana Highlands. Read More