Extended Data Fig. 2: Digital rendered holotype of Polistodon chuannanensis (ZDM8601).
From: Convergent evolution of diverse jaw joints in mammaliamorphs
a, Ventral view of the skull with both lower jaws in occlusion. b, Lateral (right) view of the cranium; c, lateral (right) view of the squamosal, jugal, and the mandible; d, lateral (right) view of the mandible (same position in c); e, posterior view of the squamosal and jugal; f, posterior view of the squamosal, jugal, and the mandible from both sides; g, posteromedial view of the right squamosal, jugal and mandible with the coronoid attached to the dentary; h, posterior view of the skull with the left mandible digitally removed. i–k, Ventral (i), dorsal (j), and posterior (k) views of the two lower jaws. Abbreviations: anp, angular process; cop, coronoid process; cor, coronoid; dec, dentary condyle; dja, dentary–jugal articulation; dpg, dorsal process of the glenoid; glj, glenoid of the jugal; i, incisor; jug, jugal; lac, lacrimal; loj, lower jaw(s); maf, masseteric fossa; mef, mental foramen; nas, nasal; occ, occipital condyle; ocp, occipital plate (bones fused in the occiput); par, parietal; prm, premaxilla; sjs, squamosal-jugal suture; sma, septomaxilla; squ, squamosal; sym, symphysis; vgz, ventral groove of the zygma (of jugal); vpg, ventral process of the glenoid.
