Phylogenetic Systematics of I guanine Lizards 101 



14. Supratemporals: (A) extend anteriorly more than halfway across the posterior 

 temporal fossae; (B) extend anteriorly no more than halfway across the posterior temporal 

 fossae. 



15. Maxilla I: (A) relatively flat or concave laterally; (B) flares outward ventral to the 

 row of supralabial foramina. 



16. Maxilla II (Figs. 5, 14): (A) premaxillary process of maxilla lies roughly in the 

 same plane as the remainder of the maxilla; (B) premaxillary process of maxilla curves 

 dorsally. 



17. Lacrimal: (A) large; (B) intermediate; (C) small. 



18. Ventral process of squamosal (Fig. 15): (A) large; (B) small or absent. 



19. Squamosal (Fig. 15): (A) separated from or barely contacting dorsal end of 

 tympanic crest of quadrate; (B) abuts against dorsal end of tympanic crest of quadrate. 



20. Septomaxilla: (A) flat, or with a weak ridge on anterolateral surface; (B) with a 

 pronounced longitudinal crest. 



21. Anterior dorsal surface of palatines (Fig. 16): (A) with a low medial ridge; (B) 

 with a high medial crest. 



22. Infraorbital foramen I (Fig. 17), process of palatine projecting posterolaterally or 

 laterally behind the infraorbital foramen: (A) large; (B) small or absent. 



23. Infraorbital foramen II (Fig. 17), process of palatine projecting posterolaterally or 

 laterally behind the infraorbital foramen: (A) fails to contact jugal; (B) contacts jugal. 



24. Infraorbital foramen III (Fig. 17): (A) located on the lateral or posterolateral edge 

 of the palatine; (B) located entirely within the palatine (may or may not be connected by a 

 suture to the lateral edge of the palatine). 



25. Pterygoids (Figs. 5, 18): (A) medial borders relatively straight anterior to the 

 pterygoid notch, pyriform recess narrows gradually; (B) medial borders curve sharply 

 toward the midline anterior to the pterygoid notch, pyriform recess narrows abruptly. 



26. Ectoptery golds: (A) fail to contact palatines near posteromedial corners of 

 suborbital fenestrae; (B) usually contact palatines near posteromedial corners of suborbital 

 fenestrae. 



27. Parasphenoid rostrum (Fig. 20): (A) long; (B) short. 



28. Cristae ventrolaterals of parabasisphenoid (Fig. 21): (A) strongly constricted 

 behind basipterygoid processes; (B) intermediate; (C) widely separated. 



29. Posterolateral processes of parabasisphenoid (Fig. 21): (A) present and large; (B) 

 small or absent. 



30. Laterally du-ected points on cristae interfenestrahs: (A) absent; (B) present. 



31. Stapes: (A) thin; (B) thick. 



32. Relative heights of dorsal borders of dentary and surangular on either side of 

 coronoid eminence (Fig. 22): (A) approximately equal; (B) dorsal border of dentary well 

 above that of surangular. 



33. Splenial: (A) large; (B) small. 



