Eodromaeus Directory References Discover What’s the Difference Between Llamas and Alpacas? 9 of the World’s Deadliest Snakes What Is the Emoluments Clause? 10 Great Sports Rivalries Is Cinco de Mayo Mexico's Independence Day? 12 Novels Considered the “Greatest Book Ever Written” Who Invented the Internet? Contents Ask Our Chatbot a Question Eodromaeus dinosaur Ask Our Chatbot a Question Learn about this topic in these articles:theropods In theropod…theropod is thought to be Eodromaeus, a 1.2-metre- (4-foot-) long dinosaur known from fossils discovered in northwestern Argentina that date to about 230 million years ago.Read More Britannica ChatbotChatbot answers are created from Britannica articles using AI. This is a beta feature. AI answers may contain errors. Please verify important information using Britannica articles. About Britannica AI.