Paratype mandibles of Infernogallus jamesi. Photographs (a, c, e, g, i, k) and illustrations (b, d, f, h, j, l) of ROM VP 64193, fused left and right dentaries (a–f) and associated left articular-surangular-coronoid complex (ROM VP 64194; g–l), in dorsal (a, b, g, h), ventral (c, d, i, j), and left lateral (e, f, k, l) views. Abbreviations: ang, angular; :ang, contact for articular; aor, anterior occlusal ridge; art, articular; core, coronoid eminence; cor:sur suture between coronoid and surangular; :dent, contact for dentary; dep, depression; emf, external mandibular fenestra; for, foramen; gen, geniogloussus attachment; lg, lingual groove; lor, lateral occlusal ridge; lr, lingual ridge; lt, lingual tubercle; mg, Meckelian groove; :pre, contact for prearticular; sulc, midline sulcus; sur, surangular; sur:art, suture between surangular and articular; tub*, autapomorphic tubercle on the posteroventral process of the dentary.