Extended Data Fig. 2: Head and trunk dermoskeletal elements of Fanjingshania renovata.
From: Spiny chondrichthyan from the lower Silurian of South China
Volume renderings based on X-ray microcomputed tomography data (a–c, e, f, h, i), scanning electron micrographs (d, g, j, k) and optical micrographs (l, m). Fused tectal tesserae (V27438.4) in a, crown and b, basal views. c, Broad asymmetrical trunk scale in crown view (V27435.23). d, Asymmetrical trunk scale (V27435.6) in crown view. Incomplete symmetrical trunk scale (V27435.7) in e, crown and f, base views. g, Crown view of an asymmetrical trunk scale (V27435.12). h, Crown view of a symmetrical trunk scale (V27435.24) with a large anterior tubercle. i, Basal view of V27435.24. j, Crown view of a trunk scale (V27435.11) with an anterior replacement odontode. k, Incomplete trunk scale (V27435.9) with an anteriorly excavated crown. l, Section through two fused tectal tesserae (V27438.5). m, Longitudinal section through a trunk scale (V27435.8). Arrowheads point to anterior. ad, atubular dentine; cb, cellular bone; po, primary odontodes; ro, replacement odontode; sb, scale base; sc, scale crown; so, secondary odontodes, tt, tectal tesserae. Scale bars, 1 mm.
