New insights into the phylogeny and skull evolution of stegosaurian dinosaurs: An extraordinary cranium from the European Late Jurassic (Dinosauria: Stegosauria)

Cranial material of Dacentrurus armatus Owen, 1875 (ML 433, ‘Miragaia longicollum’ Mateus, Maidment & Christiansen, 2009 holotype) from the Upper Jurassic of Portugal (A–G) and Stegosaurus stenops Marsh, 1887 (NHMUK PV R36730) from the Upper Jurassic of USA (H–K). Right premaxilla (A, B, H, I) in lateral (A, H), and ventral (B, I) views. Left maxilla (C, D, J) in lateral (C, J), and ventral (D) views. Left nasal (E, F, K) in lateral (E), and dorsal (F, K) views. Right angular (G) in lateral view. Abbreviations: en, external naris; ts, tooth socket. Numbers indicate the morphological character and its scoring.