アメリカ自然史博物館さんのインスタグラム写真 - (アメリカ自然史博物館Instagram)「It’s time for #FossilFriday! Meet Edmontonia rugosidens, one of the tank-like ankylosaurs that lived in the late Cretaceous period some 75 million years ago. Ankylosaurs were four-legged, plant-eating ornithischians whose short, massive bodies were covered with small bones set in a flexible skin. The ankylosaurs were the most completely armored of all the dinosaurs—some even sported spikes along the side of the body and a club at the end of the tail! This well-preserved specimen of Edmontonia was found in Alberta, Canada and is positioned with an upright posture, not with the sprawling, lizardlike limb posture it was once thought to have. See it up close in the Museum’s Hall of Ornithischian Dinosaurs! Photo: D. Finnin/ © AMNH」10月3日 7時09分