219 



52) Posterolateral process of frontal bone short and blunt [0] (Fig.40A), or long and sharp [1] 

 (Fig.40C). 



53) Supraorbital bone slender [0] (Fig.40D), or short and broad [1] (Fig.40F). 



54) Only a small portion (or none) [0] (Fig.40F), or almost half [1] (Fig.40E) of supraorbital loca- 

 ted over lateral ethmoid. 



55) Absence [0] (Fig.41A), or presence [1] (Fig.41E) of a well-developed notch at anterior and po- 

 sterior margin of infraorbital bone 1 . 



56) Infraorbital 2 long [0] (Fig.41A), or short [1] (Fig.41B). 



57) Infraorbital 3 almost equal in width for the entire bone [0] (Fig.41B), or its posterior portion 

 broader than its anterior portion [1] (Fig.41E). 



58) Anterior end of infraorbital 3 close to [0] (Fig.41H), or far from [1] (Fig.41F) the posterior end 

 of infraorbital 2. 



59) Infraorbital 4 similar to [0] (Fig.41F), or larger than [1] (Fig.41A) infraorbital 2 in size. 



60) A notch absent [0] (Fig.41A), or present [1] (Fig.41E) on posterior margin of infraorbital 4. 



61) Infraorbital 5 absent [0] (Fig.41B), or present [1] (Fig.41A). 



62) Posterior margin of the orbital septum not extending beyond [0] (Fig.42B), or extending beyond 

 [1] (Fig.42A) the posterior margin of the unfused portion of the orbitosphenoid. 



63) A process at the ventroposterior margin of the orbital septum absent [0] (Fig.42A), or present [1] 

 (Fig.42B). 



64) A process at anterior margin of the pterosphenoid absent [0], or present [1]. 



65) A process on the posterior margin of pterosphenoid present [0] (Fig.43B), or absent [1] (Fig.43A). 



66) A small [0] or large [1] portion of the pterosphenoid connecting with parasphenoid. 



67) Medial extrascapular present [0], or absent [1] on parietal. 



68) Dorsally, the lateral and medial margins of sphenoid shallowly [0] (Fig.45C), or deeply [1] 

 (Fig.45D) concave. 



69) Ventral side of sphenoid bearing four [0] (Fig.45B), or five [1] (Fig.45A), or three [2] (Fig.45D) 

 concavities. 



70) Prootic bearing a shallow [0] (Fig.46B), or a deep [1] (Fig.46C) notch on its anterior margin. 



71) A process at dorsal margin present [0] (Fig.47A), or absent [1] (Fig.47B) on prootic. 



72) Epioccipital rectangular [0] (Fig.46B), or triangular [1] (Fig.46A) in shape from the dorsal view. 



73) A process at posterior margin of the epioccipital narrow and elongated [0] (Fig.47A), or broad 

 and short [1] (Fig.47B). 



74) Anterior concavity on the ventral aspect of epioccipital without [0] (Fig.47A), or with [1] 

 (Fig.47C) a deeper concavity. 



75) A process on the anterior margin of pterotic absent [0] (Fig.48A), or present [1] (Fig.48B). 



76) Posterior process of pterotic short and blunt [0] (Fig.48A), or elongated and sharp [1] (Fig.48B). 



77) Absence [0] or presence [1] of a lateral extrascapula. 



78) The anterior margin of the wing-like structure of exoccipital shallowly [0] (Fig.49B), or deeply 

 [1] (Fig.49A) concave. 



79) Posterior margin of the plate-like portion of the exoccipital concave [0] (Fig.49B), or convex [1] 

 (Fig.49A). 



80) A mesial process at anterior margin of supraoccipital absent [0] (Fig.51C), or present [1] 

 (Fig.51A). 



81) Ventral side of supraoccipital bearing shallow [0] (Fig.51A), or deep [1] (Fig.51C) concavities. 



