Fig. 3
From: The (Paleo)Geography of Evolution: Making Sense of Changing Biology and Changing Continents
Late Cretaceous paleogeography (~85 million years ago). The continents shaded in yellow outline represent the former landmasses of Gondwana and those shaded in orange represent the former landmasses of Laurasia. Laurasia + Gondwana were united in the Pangean supercontinent (see Fig. 4). The red X's denote presumed physical barriers to faunal migration across Gondwana landmasses. The arrows denote faunal pathways evident in the fossil record