36 
APPENDIX 1 
Skeletal measurements of the neotype. 
Measurement 
Condylobasal length 
Length of rostrum 
Width of rostrum 
Width of rostrum at 60 mm anterior 
Width of rostrum at midlength 
Premaxilleries width, at rostral midlength 
Width of rostrum at 3/4 length, measured from posterior end 
Distance from tip of rostrum to external nares 
Distance from tip of rostrum to internal nares 
Greatest preorbital width 
Greatest postorbital width 
Greatest width of external nares 
Zygomatic width 
Greatest width premaxilleries 
Greatest parietal width 
Least width between temporal fossa 
Greatest length of left temporal fossa 
Greatest width of temporal fossa (at right angles to length) 
Major diameter of left temporal fossa 
Minor diameter of left temporal fossa 
Length of orbit 
Length of antero-lateral face of lacrimal measured to exclude 
the flare on the rim 
Greatest width internal nares 
Greatest length pterygoid 
Length upper tooth row to tip rostrum 
Number of teeth — upper left 
Number of teeth — upper right 
Number of teeth — lower left 
Number of teeth — lower right 
Length of lower tooth row to tip mandible 
Greatest length of left ramus 
Greatest height of left ramus 
Length of left mandibular fossa 
Length of symphysis 
Greatest width of left thyrohyal proximally 
Greatest length of left thyrohyal 
Greatest width of left stylohyal 
Greatest length of left stylohyal 
Number of thoracic vertebrae, defined as equal to number of 
ribs on side with greatest number 
Number of lumbar vertebrae 
Number of caudal vertebrae 
Total number of vertebrae 
Number of fused cervical vertebrae 
Greatest width of articulating surface of atlas 
Height of atlas — from internal anterodorsal margin of neural 
canal to bottom of anterior face of body 
Length of lateral process of atlas — from margin of anterior 
articulating surface to farthest point at end of process 
Greatest length of neural spine of atlas 
Height of dorsal ridge of atlas in anterior view 
Length of right dorsolateral spine of atlas 
Length of lateral process of axis — from margin of posterior 
Neotype 
481 
292 
110.1 
ial 
44.8 
28.9 
34.1 
323.0 
300.0 
185 
208 
50.5 
203.0 
82.0 
140.9 
137.0 
86.6 
WSS) 
Sle 
45.6 
48.6 
29.3 
60.5 
10.30 
260.0 
35 
35 
31 
32 
259.0 
407.0 
82.5 
119.4 
StS 
18.4 
66.2 
13.4 
79.4 
12 
12 
18 
49 
none 
101.9 
60.9 
28.3 
41.1 
22.8 
3) 

L.J. PORTER 
articulating surface to distal end of process 24.5 
Number of cervical vertebrae with incomplete neural arches 2 
Cervical vertebra on which left ventrolateral process reaches 
greatest development By 
Vertebra on which first vertical perforating foramen appears Dye) 
First vertebra with greatly reduced metapophyses 250 
Last vertebra with distinct transverse processes 2s 
Last vertebra with distinct neural process 25% 
First vertebra with unfused epiphysis 25m 
Last vertebra with unfused epiphysis 25% 
First caudal vertebra with vertical neural spine ae 
Length of neural spine of first thoracic — from anterodorsal 
margin of neural canal to tip of spine 36.5 
Length of neural spine of second thoracic vertebra 46.5 
Length of neural spine of tenth thoracic vertebra 65 
Length of neural spine of last thoracic vertebra 69.4 
Height of first thoracic vertebra — from internal anterodorsal 
margin of neural canal to bottom of anterior face of body 55.0 
Greatest width of first thoracic vertebra — across lateral processes 89.2 
Height of the first lumbar vertebra yes) 
Greatest width of the first lumbar vertebra 164.9 
Length of 23d centrum, exclusive of epiphyses, along vertical 
midline 40.1 
Number of vertebral ribs — left 12 
Number of vertebral ribs — right 12 
Number of two-headed ribs — left 6 
Number of two-headed ribs — right 6 
Number of floating ribs — left l 
Number of floating ribs — right 2 
Number of sternal ribs — left 5 
Number of sternal ribs — right 5 
Greatest length of first left vertebral rib 123.6 
Width of first left vertebral rib at apex of proximal curvature IS) 7/ 
Greatest length of longest left vertebral rib 141.4 
Greatest width of manubrium 88.8 
Length of manubrium along midline 84 
Depth of anterior notch of manubrium 12 
Length of foramen in manubrium 5 
Number of chevron bones 7 
Vertebra bearing first chevron bone 24" 
Vertebra bearing last chevron bone Sills 
Greatest length of first half of largest chevron bone 44.3 
Greatest length of first half of last chevron bone 22.9 
Height of scapula — from posterior margin of glenoid fossa 
to coracovertebral angle 1251 
Length of scapula — from posterior margin of glenoid fossa 
to glenovertebral angle 110.3 
Greatest length of coracoid process — from anterior margin 
of glenoid fossa PHS) 
Greatest width of coracoid process 11.6 
Greatest width of metacromion process — from apex of ventral 
curvature to vertebral apex 54.5 
Greatest length of humerus, measured on ventral side of flipper 63.9 
Greatest width of humerus distally SEES) 
Greatest length of radius 74 
Greatest width of radius distally 38.2 
Greatest length of ulna 65.9 
Transverse breadth of proximal row of carpals We 
Greatest length of left pelvic rudiment 108.7 
