@Mariana Rivera Rodriguez: Thanks for catching this! Of course, there are plenty of Opossums all over Central & South America. I have removed this article from the page until it can be fixed at the source.
Actually, D.virginiana is not the only marsupial native to someplace other than the Australian region. See Order Didelphimorphia, Family Didelphidae. There are in fact over 80 species of opossum native to the Neotropical region.