Dinosauria › Ornithischia › Cerapoda › Ornithopoda Hypsilophodontidae Small fast bipedal plant-eaters. Daurosaurus olovus 168.2–165.3 Mya · Unknown locality Gideonmantellia 145–100 Mya · Spain Vectidromeus insularis 145–100 Mya · United Kingdom Hypsilophodon foxii 130–125 Mya · Europe