Fig. 43 in The Early Evolution Of Archosaurs: Relationships And The Origin Of Major Clades

Fig. 43. Astragali of archosauriforms: A, right astragalus of Alligator mississippiensis (AMNH FR unnumbered) in anterior (left), posterior (middle), and proximal (right) views; B, right astragalus of Fasolasuchus tenax (PVL 3850) in anterior (left), posterior (middle), and proximal (right) views; C, right astragalus of Effigia okeeffeae (AMNH FR 30587) in anterior (left), posterior (middle), and proximal (right) views; D, left astragalus of Riojasuchus tenuisceps (PVL 3827) in anterior (left), posterior (middle), and distal (right) views; E, right astragalus of Pseudopalatus (UCMP 27235) in anterior (left), posterior (middle), and lateral (right) views. Arrow indicates anterior direction. Numbers refer to character states. See appendix for anatomical abbreviations. Scales 5 1 cm.