Comparisons of cross-section outlines of various stegosaurian caudal spines

Comparisons of cross-section outlines of various stegosaurian caudal spines: (a-b) UNSM V 4937 (S. sulcatus holotype; see Gilmore, 1914); (c-e) SHN.LPP 123 (see Escaso, 2014); (f, g) NHMUK PV OR 46013 (D. armatus holotype; see Owen, 1875); (h, i) MG 4863 (M. longicollum; see Costa and Mateus, 2019); (j, k) ML 2043-1 (see Costa and Mateus, 2019); (l, m) 2043-3 (see Costa and Mateus, 2019); (n, o) ML 812 (see Costa and Mateus, 2019); (p, q) ML 436 (see Costa and Mateus, 2019); (a, c, e, f, h, j, l, n, p) stacked cross-sections (respective ‘i’ to ‘v’), outlines based on broken sections or/and 3D models, in distal view; (b, g) in right lateral view; (d, k, m) in dorsal view; (i) in anterior view; (o) in posteroventral view ventral; (q) in left medial view.