The Yukon wolf (Canis lupus pambasileus), also known as the autocrat timber wolf or interior Alaskan wolf is a possible subspecies of gray wolf native to the Alaska Interior and Yukon, save for the tundra region of the Arctic Coast. It was first described as a distinct subspecies in 1905 by Daniel Elliot, who described it as being larger in skull and tooth proportions than C. l. occidentalis, and of ranging from black to white or a mix of both in color. As of 2005, it is considered a valid subspecies by MSW3, though it is classed as a synonym of C. l. occidentalis by the United States Fish and Wildlife Service.