Fig. 2: Preserved skin of Psittacosaurus (NJUES-10).

Higher magnification views of the soft tissues in the regions indicated in Fig. 1b under natural light (a, d, f) and UV light (b, c, e, g); arrowheads in (b) indicate glue (green) along a fissure of the slab. Regions defined by dashed lines in (b, e, g) correspond to the samples shown in Figs. 5a–b, 4a–b, 3a, respectively. See also Supplementary Fig. 2 for soft tissues preserved in other body regions.