Figure 17.1   Archosaurs: (a) skull of the Early Triassic archosaur Erythrosuchus (×0.1); (b) the Late Jurassic pterosaur Rhamphorhynchus, showing the elongated wing fi nger on each side, and the long tail with its terminal “sail” made from skin (×0.3); and (c) the Late Jurassic crocodilian Crocodilemus, showing the skeleton and armor covering (×0.2). (Courtesy of David Unwin and Danny Grange.)

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