Mythosaur is an animal native to the Outer Rim world of Mandalore. Enormous in size, the mythosaurs dominated their world until the arrival of the Mandalorians led by the warrior known as Mandalore the First. In a campaign to conquer the world for their own, Mandalore the First and his crusaders slaughtered the gigantic beasts and drove them to extinction. The skull of the mythosaur became the symbol of the Mand' Alor—the traditional ruler of all the Mandalorian clans—the planet Mandalore, and of the Mandalorians themselves for generations after. Perhaps the most notable feature of the mythosaur was it's sheer size, so enormous that accounts estimated the creatures to be on par with the scale of a small city. Four powerful legs supported what was surely an impressive weight, for a being of similar size to that of a city. Some manner of sexual dimorphism was evident between the skulls of male and female mythosaurs, but in general, the skull of a mythosaur featured large, downturned horns that curved inward toward the creature's jaw, slanted eye sockets, and a mouth that contained a number of long teeth. Mythosaur never really appeared or see by somebody because they are already extinct and the last of their species was killed by Mandalore the First.

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