Hypsilophodon, the cursorial non-arboreal dinosaur.
D000220:Adaptation, Biological; D000818:Animals; D004739:England; D005552:Forelimb / Q000033:anatomy & histology; D006614:Hindlimb / Q000033:anatomy & histology; D008124:Locomotion; D010163:Paleontology; D012104:Reptiles / Q000033:anatomy & histology* / Q000502:physiology; D013623:Tail / Q000033:anatomy & histology