English: The holotype of Tessellatia bonapartei, gen. et sp. nov. (PULR-V121). (a) Cranium as preserved in right lateral view; (b) 3D model of the cranium in right lateral view; (c) interpretation line drawing of the skull and right lower jaw (restored to its natural position) in right lateral view; (d) digital render of the skull showing the roots of the anterior upper postcanines, not visible externally; (e) 3D model of the osseous secondary palate and upper teeth in ventral view; (f) interpretation line drawing of the osseous secondary palate and upper teeth in ventral view; (g) right lower jaw in dorsal view; (h) right lower jaw in medial view; (i) 3D model of the pc4 in labial, occlusal and lingual views (from left to right); (j) 3D model of PC9 and PC10 in labial, occlusal and lingual views (from left to right). aac anterior accessory cusp, an angular process, C/c upper/lower canines, cin cingulum, co coronoid, d dentary, fr frontal, I/i upper/lower incisors, iof infraorbital foramen, l lacrimal, mc main cusp, mf masseteric fossa, mx maxilla, n nasal, pac posterior accessory cusp, pal palatine, PC/pc upper/lower postcanines, pmx premaxilla, pt pterygoid. Scale bars a-h: 5 mm; i-j: 2.5 mm.