vi Contents 



SYSTEMATIC CHARACTERS 100 



Skeletal Characters, 100 

 Nonskeletal Characters, 104 



CHARACTER POLARITIES AND THE PHYLOGENETIC INFORMATION 



CONTENT OF CHARACTERS 1 06 



ANALYSIS OF PHYLOGENETIC RELATIONSHIPS 1 17 



PreHminary Analysis, 1 17 

 Lower Level Analysis, 122 



PHYLOGENETIC CONCLUSIONS 130 



Preferred Hypothesis of Relationships, 130 

 Character Evolution within Iguaninae, 130 



COMPARISONS WITH PREVIOUS HYPOTHESES 132 



DIAGNOSES OF MONOPHYLETIC GROUPS OF IGUANINES 135 



Iguaninae Bell 1825, 135 

 Dipsosaurus Hallowell 1854, 141 

 Brachylophus Wagler 1830, 143 

 Iguanini Bell 1825, 145 



Ctenosaura Wxtgmonn 1828, 146 

 Sauromalus T)\xvi\€n\ 1856, 157 

 Amblyrhynchina, new taxon, 160 

 Amblyrhynchus Bell 1825, 163 

 Conolophus Fitzinger 1843, 165 

 IguaninaBell 1825, 167 

 Iguana Laurenti 1768, 168 

 Odwra Harlan 1824,170 



Appendix I: Specimens Examined, 175 



Appendix II: Polarity Determination Under Uncertain Outgroup 



Relationships, 179 

 Appendix III: Polarity Determination for Lower Level Analysis, 185 

 Appendix IV: Polarity Reevaluation for Lower Level Analysis, 187 

 Literature Cited, 191 



