English: The skull material (UMNH.VP.26004) of Mierasaurus bobyoungi gen. nov, sp. nov.: (a) braincase (DBGI 173) in dorsal view; (b) braincase (DBGI 173) in left ventrolateral view; (c) reconstruction of the skull of Mierasaurus. Shaded bones were either not preserved or yielded no information if they were; (e) braincase (DBGI 173) in left lateral view; (f) nasal (DBGI 85 A) in dorsal view; (g) anterior fragment (muzzle) of the right premaxilla (DBGI 107 D) in left lateral view; (h) right lacrimal (DBGI 160) in left lateral view; (i) right quadrate (DBGI 54) in right lateral view; (j) right jugal (DBGI 78B) in right lateral view; (k) fragment of right maxilla (DBGI 78) in left lateral view (l) fragment of the right maxilla (DBGI 95I) in left lateral view; (m) fragment of the right maxilla (DBGI 95I) in ventral view; (n) fragment of nasal and ascending process of the premaxilla (DBGI 107D) in right lateral view; (o) a premaxillary-maxillary tooth (DBGI 95) in lingual view; (p) a premaxillary-maxillary tooth (DBGI 95) in labial view; (q) right surangular (DBGI 71) in right lateral view; (r) left prearticular (DBGI 70) in lateral view; (s) left dentary (DBGI 60) in medial view; (t) CT image of the dentary in transverse cross-section showing two replacement teeth; (u) anterior dentary teeth (DBGI 60) in lingual view; (v) posterior tooth (DBGI 27) in labial view; (w) posterior tooth (DBGI 27) in lingual view. A plus sign (+) indicates a synapomorphy of Turiasauria: teeth with a heart-shaped outline. An asterisk (*) indicates autapomorhies of Mierasaurus bobyoungi gen. et sp. nov. For abbreviations see supplementary information. (a), (b) and (c) were drafted by R.R.T. (© Fundación Conjunto Paleontológico de Teruel-Dinópolis) in Adobe Illustrator CS5 (www.adobe.com/es/products/illustrator.html).