Proper noun
the Wallace Line
A faunal boundary line that separates the ecozones of Asia and Wallacea, a transitional zone between Asia and Australia.
Synonym: Wallace's Line
The Wallace Line is a faunal boundary that runs through the strait between Bali and Lombok. Source: Internet
Wallace's trip to Bali was instrumental in helping him devise his Wallace Line theory. Source: Internet
Where Worlds Collide: The Wallace Line. Source: Internet