Ornithischia (extinct order)
Esquema
Jerarquía
Eukaryota (domain) > Animalia (kingdom) > Chordata (phylum) > Vertebrata (subphylum) > Reptilia (class) > Diapsida (subclass) > Dinosauria (extinct superorder)
Descripción
Extinct order of obligate bipedal or quadrupedal, beaked, herbivorous dinosaurs characterized by a pelvic structure like that of birds, a beak-like structure in the front part of the mouth and grinding teeth in the rear, a four-branched pelvis, toes that often have hooflike structures., and often having heavy armor and horns. Dating from the Upper Triassic to Upper Cretaceous, existed in five major groups: ornithopods, pachycephalosaurs, stegosaurs, ankylosaurs, and ceratopsina dinosaurs.
URI original del concepto
Otros términos
- ornithischians [en]
- ornithischian [en]
- bird-hipped dinosaurs [en]
- Predentata [en]
- Predentata [la]