Argoans were the dominant species of the planet Argo and an offshoot of the Kryptonian species.
History[]
Superman: Little Girl Lost[]
Like Kryptonians, Argoans developed vast superpowers while under the influence of a yellow sun such as Earth's, and they shared the Kryptonian vulnerability to Kryptonite radiation.
The only known surviving member of the Argoan species is Kara In-Ze, better known as Supergirl.
Justice League Unlimited: CADMUS Crisis[]
For a time, another Argoan existed in the form of Galatea—a clone of Supergirl.