Wallace Line by the Sahul Shelf to New Guinea. The biogeographic boundary known as Lydekker's Line, which separates the eastern edge of Wallacea from the Australian region, has a similar origin to the Wallace line. During ice age glacial advances, when the , both Asia and Australia were united with what are now islands on their respective continental shelves as continuous land masses, but the deep water between those two large continental shelf areas was, for over 50 million years, a barrier that kept the flora and fauna of Australia separated from those of Asia. Wallacea consists of islands that were not
Peter Wallace Wallace was selected for the City vs Country Origin match in 2008. In May, 2008, Wallace was selected as halfback for New South Wales for game I of State of Origin on 21 May at ANZ Stadium. With his first touch of the ball, he made a line break. He also had a hand in two tries and placed a pin point accurate kick for Anthony Quinn to score the second try of the night. He made only one error and took many hits from Queensland players, making 29 tackles. Wallace was selected for the Blues again in Game II