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what was the presence of mesosaurus fossils tells the initial location and positioning of south america, africa and antartica

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Jovelledolorito02viz
Mesosaurus is a freshwater reptiles and they are located in different continent South America, africa and ANTARTICA.
Watchmeeviz
it just tells that once the contenents were connected and located in a supercontinent called pangaea and these creatures can just walk through land and reach the other continents because there are no bodies of water that seperates them