autochthonal

from WordNet (r) 3.0 (2006)

autochthonal
    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}]

from The Collaborative International Dictionary of English v.0.48

Autochthonal \Au*toch"tho*nal\, Authochthonic
\Au`thoch*thon"ic\, Autochthonous \Au*toch"tho*nous\, a.
   Aboriginal; indigenous; native.
   [1913 Webster]