Antos IV was the fourth planet of the Antos system, and was the homeworld to a benevolent and peaceful people who cared for Captain Garth of Izar after he suffered an accident. During the 2260s, they taught Garth the art of cellular metamorphosis. (TOS: "Whom Gods Destroy")
Antos IV was also the home to an energy-controlling species known as giant dry-worms. (TOS: "Who Mourns for Adonais?")
According to The Worlds of the Federation, the star that Antos IV orbited was named Antos, and the Antosians refer to their world as Dorafane.