Ungulates (pronounced /ˈʌŋɡjʊleɪts/) are a diverse group of large mammals, most of which use the tips of their toes, usually hoofed, to sustain their whole body weight while moving. The term means, roughly, "being hoofed" or "hoofed animal". As a descriptive term, "ungulate" normally excludes cetaceans, as they do not possess most of the typical morphological characteristics of ungulates; recent discoveries indicate that they are descended from early artiodactyls, and thus are directly related to other even-toed ungulates such as cattle, with hippopotamuses being their closest living relatives. As a result of these discoveries, the new order Cetartiodactyla has been proposed to include the members of Artiodactyla and Cetacea, to reflect their common ancestry; however, strictly speaking, this is merely a matter of nomenclature, since it is possible simply to recognize Cetacea as a subgroup of Artiodactyla.