endemic

Native to a particular area or culture; originating where it occurs.

The endemic religion of Easter Island arrived with the Polynesian settlers.

Peculiar to a particular area or region; not found in other places.

Kangaroos are endemic to Australia.

[…] a continental northern Alaskan element, including a series of endemic species and disjuncts that have survived the Pleistocene glaciation in northern Alaska and thus represent relicts of the much warmer Tertiary […]

Prevalent in a particular area or region, persistent within a population.

Malaria is endemic to the tropics.

1998, Gillian Catriona Ramchand, Deconstructing the Lexicon, in Miriam Butt and Wilhelm Geuder, eds. “The Projection of Arguments” These problems are endemic to the theory of thematic roles as currently conceived, because the classification it implies simply does not correspond to legitimate linguistic semantic definitions.

An individual or species that is endemic to a region.

The species that appeared as a consequence were endemics; that is, they were found nowhere else in the world.

A disease affecting a number of people simultaneously, so as to show a distinct connection with certain localities.