ヒプシロフォドン Hypsilophodon オーストラリア恐竜大陸
世界共通発音: ヒプシロフォドン hip-see-loaf-oh-don
命名意味: High-ridged Tooth
Ornithischia / Genasauria / Cerapoda / Ornithopoda / Family: Hypsilophodontidae
/ First Discovered: 1849 / Found: Worldwide：Europe;North America;Asia / Length: 2.5m
/ Weight: 25kg / Food: Plants / Young: Eggs / Lived: Early Cretaceous 130-115 mya
Although the remains of Hypsilophodon were discovered in 1849, the animal was not named until 1889. The reason for the delay was simple: 19th century scientists thought it was a baby Iguanodon. For the next 80 years this tiny ornithopod (bird-footed dinosaur) was thought to be a tree dweller. In fact, a model of Hypsilophodon holding on to a branch was a central exhibit at the Natural History Museum in London for many years.
More recently, however, experts have worked out that this was an agile little dinosaur with long, strongly built back legs and short arms. It had quite a large head with a beak at the front of its mouth and a row of small grinding teeth behind. As its name suggests, these teeth were ridged. Hypsilophodon was a founder member of the Iguanodon line of dinosaurs, which reached its peak with the appearance of the duck-billed dinosaurs during the Cretaceous. It may have evolved from an animal such as Heterodontosaurus. The Hypsilophodon was a primitive ornithopod from the Early Cretaceous.