autochthonous

autoktoninen native Native to the place where found; indigenous.
1889, Justin Winsor, Narrative and Critical History of America, Vol. I, page 375:

Two of the most celebrated of the evolutionists reject the autochthonous view, for Darwin's Descent of Man and Haeckel's Hist. of Creation consider the American man an emigrant from the old world, whatever way the race may have developed

When, in 1858, Joseph Lister amputated the right leg of a six-year-old girl suffering from gangrene, he noted that the autochthonous blood clot extended down the anterior tibial artery as far as the commencement of the gangrene.

Death and burial may be simultaneous, resulting in a preserved snapshot of an autochthonous assemblage that may be compared directly with present day ecosystems.