Cetartiodactyla's the clade to which whales (including dolphins) and even-toed ungulates have currently been placed. The term was coined by merging the name for the two orders, Cetacea and Artiodactyla, into a single word. The term Cetartiodactyla's most commonly used to describe the classification that whales evolved from within the artiodactyls. Under this definition their closest living land relative's thought to be the hippopotamus. The clade formed by uniting whales and hippos's called Whi… (More on Cetartiodactyla)