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To preface this post, I want to note that I am not seeking a direct answer to the question that I am about to pose. I simply felt that some members of this forum may have insight on this topic and that it could generate an interesting and informative discussion. For a long while I have been fascinated by the diverse and unique insular faunas that have been uncovered in the fossil record. On a larger scale, unique faunas developed during the Cenozoic on the continents of Australia and South America, which were both isolated continents. Many smaller islands, such as New Zealand and Cyprus, are famous for having had unique examples of insular gigantism and dwarfism during the Pleistocene epoch. Although there are numerous examples from the latter portion of the Cenozoic, insular communities from the Mesozoic and Paleozoic are in far shorter supply. Of course, the discrepancy is likely due to the lower resolution we have as we travel farther back in time rather than a lack of island communities during these eras. Yet one cannot help but wonder what organisms could have evolved on islands during these very different periods of Earth's history. The late Cretaceous island communities of Madagascar and Hateg island have already offered some tantalizing clues as to what strange routes evolution can take in an insular environment. So, I suppose that this is a very roundabout way of asking if any additional island communities are known from the Mesozoic and Paleozoic and what evolutionary patterns members think may have been exhibited on islands during these time periods given the prevailing forms of life at the time. This thought first came to me when I considered the landmass of Pangea. There must have been islands during the latest Paleozoic and early Mesozoic that may have had the opportunity to develop unique faunas throughout the lifespan of the supercontinent. Although we will never have a full picture due to the imperfections of the fossil record, I hope that everyone finds this as interesting to ponder as I have .