1 2 University of California Publications in Zoology 



a diagnosis and a description of the group, including the evidence for its monophyletic 

 status; (2) to describe variation in the iguanine skeleton, as well as review certain aspects of 

 nonskeletal morphology; (3) to generalize characters based on this variation; (4) to assess 

 the polarity of these characters and, thus, their usefulness as evidence for close 

 phylogenetic relationship; (5) to determine the phylogenetic relationships that most 

 reasonably account for the distributions of these characters among various iguanine lizards; 

 and (6) to provide diagnoses and other pertinent information for monophyletic groups 

 within iguanines. The pursuit of these goals has raised numerous questions, some of 

 which are also addressed. 



