Octávio Mateus (Born 1975) is a Portuguese paleontologist. Some dinosaurs he has helped name include Lourinhanosaurus, Tangvayosaurus, Draconyx, Lusotitan, Europasaurus, Allosaurus europaeus, Angolatitan, Torvosaurus gurneyi, Zby, Galeamopus pabsti, Issi, and Iberospinus.