I want to know the answer to the following question:
How did Wallace claim that patterns in the distribution of species could be explained?
All the background I'm provided with is that "An 1855 paper on the "introduction" of species, written by Alfred Russel Wallace, claimed that patterns in the geographical distribution of living and fossil species could be explained if every new species always came into existence near an already existing, closely related species.". Is that enough to answer the question?