Ophiacodonts were mammal-like reptiles living on the Pangea continent during the Carboniferous Period (~359-300 million years ago). This ophiacodont model is part of a diorama created at the Sam Noble Museum, the University of Oklahoma. This photograph is an excellent example of its kind: a true-to-life reconstruction in its ecological setting.
Iguanodon footprints outside Oxford Museum of Natural History
Archaeopteryx cast, Manchester Museum