From WordNet (r) 3.0 (2006) :
autochthonic
adj 1: originating where it is found; "the autochthonal fauna of
Australia includes the kangaroo"; "autochthonous rocks
and people and folktales"; "endemic folkways"; "the Ainu
are indigenous to the northernmost islands of Japan"
[syn: autochthonal, autochthonic, autochthonous,
endemic, indigenous]