viii List of Illustrations 



25. Lateral views of the right mandibles of Iguana delicatissima, Sauromalus obesus, and 

 Amblyrhynchus cristatus, 53 



26. Lateral views of the right mandibles of Dipsosaurus dorsalis, Brachylophus vitiensis, 

 and Iguana iguana, 55 



27. Medial views of the left mandibles of Iguana delicatissima and Conolophus 

 subcristatus, 56 



28. Dorsal views of the posterior ends of the right mandibles in ontogenetic series of 

 Ctenosaura hemilopha and Amblyrhynchus cristatus, 57 



29. Dorsal views of the posterior ends of the right mandibles in an ontogenetic series of 

 Dipsosaurus dorsalis, 58 



30. Lingual views of left maxillary teeth of four iguanines and Basiliscus plumifrons, 62 



31. Hypothetical character phylogeny for the iguanine pterygoid tooth patch, 65 



32. Corneal view of the left scleral ring of Ctenosaura similis, 67 



33. Ventral views of the iguanine hyoid apparati, 68 



34. Twentieth presacral vertebra of Brachylophus vitiensis, 70 



35. Lateral views of the twentieth presacral vertebrae of Sauromalus obesus and 

 Ctenosaura pectinata, 11 



36. Dorsolateral views of the twentieth presacral vertebrae of Dipsosaurus dorsalis and 

 Sauromalus obesus, 73 



37. Dorsal views of caudal vertebrae of Dipsosaurus dorsalis from different regions of the 

 tail, 76 



38. Lateral views of the ninth caudal vertebrae of Dipsosaurus dorsalis and Iguana iguana, 

 79 



39. Presacral and sacral vertebrae and ribs of Dipsosaurus dorsalis in ventral view, 80 



40. Pectoral girdles of three iguanines, 82 



41. Dorsal views of the pelvic girdles of Sauromalus obesus and Ctenosaura pectinata, 86 



42. Bones of the anterior limb of Brachylophus fasciatus, 87 



43. Right hind limb skeleton of Brachylophus fasciatus, 88 



44. Right tarsal region of Brachylophus fasciatus, 90 



45. Anterodorsal views of pedal digit II of three iguanines, 97 



46. Minimum-step cladograms for eight basic taxa of iguanines resulting from a 

 preliminary analysis of 29 characters, 119 



47. Alternative interpretations of character transformation for homoplastic characters on a 

 minimum-step cladogram, 121 



48. Alternative interpretations of character transformation for homoplastic characters on a 

 minimum-step cladogram, 122 



49. Minimum-step cladograms resulting from an analysis of 26 characters in a subset of 

 iguanines, 127 



50. Consensus cladogram for the three cladograms illustrated in Figure 49, 128 



51. Phylogenetic relationships within Iguaninae, according to the present study, 131 



52. Geographic distribution of Di/?^o^aMrM5, 141 



53. Geographic distribution of firacA}'/<9/p/zM5', 144 



