(A) Photograph of block GSI/GC/2903 showing the position of preserved cranial elements, which rest in near anatomical articulation upon a chain of vertebrae (anterior towards top). The braincase was removed from the block prior to final preparation, but its original position (gray tone) can be seen in Figure 1. (B–E) Half-tone drawings of the braincase in (B) dorsal; (C) ventral; (D) left lateral; and (E) right lateral views. aac, Atlas-axis complex; ap, accessory process of the crista interfenestralis; ci, crista interfenestralis; ct, crista tuberalis; f, frontal; fo, fenestra ovalis; jr, juxtastapedial recess; l, left; mn, mandible; mx, maxilla; oc, occipital condyle; oto, otooccipital; pa, parietal; pal, palatine; pbp, parabasisphenoid processes; pbs, parabasisphenoid; pr, prootic; pvc, posterior vidian canal; r, right; rst, recessus scalae tympani; sc, sagittal crest; so, supraoccipital; st, supratemporal; v–vii, openings for cranial nerves. Scale bars equal 2 cm.