The boundary between Sundaland and Wallacea follows the Wallace Line, named after the naturalist Alfred Russel Wallace who recorded the differences between mammal and bird fauna between the islands on either side of the line.
A fronteira entre Sondalandia e Wallacea segue a liña de Wallace, chamada así pollo naturalista Alfred Russel Wallace, que se decatou das diferenzas na fauna de aves e mamíferos entre as illas a ambos os lados da liña.