Extended Data Fig. 1: Holotype of Polistodon chuannanensis (ZDM8601).
From: Convergent evolution of diverse jaw joints in mammaliamorphs
a, Dorsal view with the lower jaws in occlusion; b, Lateral (left); c, ventral; d, lateral (right); e, anterior; f, posterior; g, ventrolateral (right). Abbreviations: anp, angular process; apn, anterior process of the nasal; cop, coronoid process; dec, dentary condyle; dja, dentary–jugal articulation; glj, glenoid of the jugal; iav, incisor alveolus; i, incisor; jug, jugal; lac, lacrimal; nab, nasal boss; occ, occipital condyle; pdt, postdentary trough; sac, sagittal crest; sjs, squamosal-jugal suture; sma, septomaxilla; squ, squamosal; sym, symphysis; vgz, ventral groove of the zygma (of jugal).
