peripatric
Adjective
Meaning
(biology) Living in overlapping territories.
(genetics, biology) Living in overlapping territories without interbreeding.
Source: en.wiktionary.orgExamples
Genetic drift is often proposed to play a significant role in peripatric speciation.
This is similar to peripatric speciation in that a small population enters a new habitat, but differs in that there is no physical separation between these two populations.