Phylogenetic Systematics of I guanine Lizards 



65 



Conolophus 



Iguana 



row doubles throughout 



increase in number of teeth 



Amblyrhynchus 



anterior part of row lost 



Ctenosaura 



Cyclura 



Sauromalus 



row doubles posteriorly 



posterior part of row moves laterally 



Brachylophus 

 Z' (Cyclura) 



(Sauromalus ) 



FIG. 31. Hypothetical character phylogeny for the iguanine pterygoid tooth patch. An asterisk indicates 

 that pterygoid teeth are sometimes absent; parentheses indicate a rare condition in the enclosed taxon. See 

 text for details. 



