_ BARYONX WALKERI 
S¥h Carpals reduced to disc-like structures lacking distinct articular surfaces (59; Gauthier 1986) 
58. Parasphenoid capsule bulbous (60; Barsbold 1974, Osmolska et al. 1972) 
Se) Pterygoid canal present (61; Kurzanov 1976a) 
60. Metatarsals II and IV contact each other distally on plantar surface (62; Wilson & Currie 1985) 
61. Frontals long and triangular (65; Currie 1987) 
62. Arctometatarsus present (66; Holtz 1994b) 
63. Metatarsus gracile (67; Holtz 1994b) 
64. Paroccipital process very deep top-to-bottom at root (68; Bakker ef al. 1988) 
65. Iliac blades contact along most of dorsal surface (70) 
66. Ischium bears semicircular scar anteriorly (71) 
67. Orbit circular and expanded (73) 
68. Occipital region deflected ventrally (74) 
69. Endocranium enlarged (75; Russell 1972, Hopson 1980) 
70. Orbit with pronounced rim (76) 
TAM Lesser trochanter extended by lamella of bone, separate from main body of femur (77; Currie & Russell 1988) 
72. Cervical zygapophyses flexed (78; Gauthier 1986) 
13: Subsidiary fenestra between palatine and pterygoid (79; Gauthier 1986) 
74. Obturator process triangular (80) 
12% Astragalar ascending process more than one-fourth length of epipodium (81) 
76. Anterior cervicals broader than deep on anterior surface, with kidney-shaped articular surfaces that are taller laterally than on midline (82; Gauthier 1986) 
iT. Nasals narrow (83; Bakker et al. 1988) 
7B. Tertiary antorbital fenestra present (84) 
18). Anterior cervical zygapophyses elongate (85; Gauthier 1986) 
80. Jugal expressed on rim of antorbital fenestra (86) 
81. Number of caudal vertebrae with transverse processes not more than 15 (87; Gatesy 1990) 
82. Ectopterygoid flange with deeply excavated pocket on ventral surface (88; Gauthier 1986) 
83. Surangular foramen large (89) 
84. Cervical vertebrae pleurocoelous (90) 
85. Obturator foramen lost (91) 
86. Lesser trochanter placed proximally (92) 
87. Presacral vertebral column reduced anteroposteriorly relative to femur length (93; Bakker et al. 1988) 
88. Obturator process present (94; Gauthier 1986) 
89. Basal half of metacarpal I closely appressed to metacarpal II (95; Gauthier 1986) 
90. Manual digit IV lost (96; Gauthier 1986) 
OT. Tibial shaft with cnemial process arising out of lateral surface (97; Mader & Bradley 1989) 
92. Pubic boot pronounced (98) 
93. Astragalar ascending process more than one-sixth length of epipodium (99) 
94. Tibia with sharp anterolateral ridge for clasping fibula (100; Welles & Long 1974) 
95. Distal end of fibula reduced (101) 
96. Coracoid tapers posteriorly (102; Gauthier 1986) 
97. Occiput, in posterior view, deeper above foramen magnum (103; Bakker er al. 1988) 
98. Surangular with anterior portion deep (105; Gauthier 1986) 
99. Distal caudals strongly interlocked (106) 
100. Transition point in tail begins closer to proximal half (107; Gauthier 1986) 
101. Accessory antorbital fenestra pronounced and round (108; Bakker et al. 1988) 
102. Chevrons attenuated distally (109; Gauthier 1986) 
103. _ Last maxillary tooth lies anterior to orbit (110; Gauthier 1986) 
104. Anterior prong of angular penetrates dentary-splenial cavity (111; Bakker et al. 1988) 
CIDA WN — 
105. Axis with spine table (112; Gauthier 1986) 
106. Scapula with narrow strap-like blade (113; Bakker et al. 1988) 
107. _Interdental plates lost (114) 
108. Paroccipital root pneumaticised (116; Bakker ef al. 1988) 
109. Lesser trochanter aliform (117; Gauthier 1986) 
110. All three pelvic elements fused together in adults (118; Rowe & Gauthier 1990) 
111. Premaxillary teeth lost (119) 
112. _Dentary teeth lost (120) 
113. | Number of sacral vertebrae more than five (121) 
114. Metatarsal IV longer than metatarsal II and closer in length to metatarsal III (122; Holtz 1994b) 
115. Astragalar ascending process with round external fossa at its base (123; Mader & Bradley 1989) 
116. Metacarpal I not more than one-third length of metacarpal II (124) 
117. Manual digit I reduced in length (125; Gauthier 1986) 
118. Premaxillary tooth crowns asymmetrical in cross-section (126; Bakker er al. 1988) 
The following characters were used by Holtz (1994) in his data-matrix, but are considered by us to be unsatisfactory: 
. Cervical vertebrae with two pairs of pleurocoels (4; Gauthier 1986) 
. Tibia and metatarsus elongate (54; Holtz 1994b) 
. Occiput deeper above supraoccipital wedge (63; Bakker et al. 1988) 
. Periotic region with large depression (64; Bakker et al. 1988) 
. Fenestra ovalis surrounded by large excavation (69; Bakker er al. 1988) 
. Humerus straight (72) 
. Combined premaxillae at symphysis U-shaped (104; Bakker et al. 1988) 
. Periotic region highly pneumaticised (115; Bakker er al. 1988) 
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