(A) Squamation model showing division of areas. (B) 3D model by Dinghua Yang, showing distribution of scale morphotypes. Small letters in (A) represent the (a) predorsal, (b) dorsal fin, (c) posterodorsal, (d) dorsolateral, (e) anterior flank, (f) posterior flank, (g) ventral, (h) ventrolateral and (i) caudal lobe areas. Scales from CT reconstruction in (B) share the same scale bar and are aligned towards the anterior direction, as indicated by the black arrow. Each morphotype is represented by a typical scale or scales with the most disparity within the morphotype. Deep and light red lines represent the exact and inferred trajectory of the lateral line, respectively. ADL, anterior dorsolateral plate; AMD, anterior median dorsal plate; AVL,anterior ventrolateral plate; other abbreviations see text and Figures 1 and 3. Scale bars equal to 2 mm.