When the dinosaurs first arrive at the beginning of the episode, one asks "Monkeys went bald?" There were no mammals even similar to monkeys alive during the eras of dinosaurs. Plesiadapiforms, the likely ancestors of modern primates, did not share an appearance to monkeys.
When the Dinos are addressing the world leaders, there is some awkwardness implying that oil was the remains of dinosaurs. This is a myth, crude oil was made from dead animals and plants that existed millions of years before dinosaurs.