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University of California Publications in Zoology 



FIG. 56. Geographic distribution of Sauromalus (from C. E. Shaw, 1945; Gates, 1968; Etheridge, 

 1982). 



6. Crowns of posterior marginal teeth with five or more cusps (46-C). This character 

 occurs in Cyclura and Iguana and may thus be a synapomorphy of a more inclusive group. 

 It also occurs in Ctenosaura defensor, in which it is interpreted as convergent. 



7. Second ceratobranchials of hyoid apparatus short, often less than two-thirds the 

 length of the first ceratobranchials (52-53-A). This character also occurs in 

 Amblyrhynchus and Conolophus, in which it is either convergent or a synapomorphy of a 

 more inclusive taxon. 



8. Second ceratobranchials not in contact medially for most or all of their lengths (54- 

 B). This character also occurs in Amblyrhynchus, in which it is interpreted as convergent. 



9. Neural spines of presacral vertebrae short, less than 50% of total vertebral height 

 (55-B). 



10. Fewer than 40 caudal vertebrae (59-B). This character occurs also in Ctenosaura 

 clarki and C. defensor, in which it is interpreted as convergent. 



11. Postxiphistemal inscriptional ribs never form continuous midventral chevrons (63- 

 A). The polarity of this character is questionable. It also occurs in Dipsosaurus, in which, 

 if derived, it is interpreted as convergent. 



12. Suprascapular cartilages situated primarily in a horizontal plane, and each forms an 

 angle rather than a smooth curve with the scapula (64-B). 



