|
Name |
Era |
Description |
|
Ohmdenosaurus |
|
|
| Oligosaurus |
|
Junior synonym of
Rhabdodon |
| Olorotitan |
|
|
|
Omeisaurus |
|
|
|
Omnivoropteryx |
|
Probably a bird |
| Omosaurus |
|
Preoccupied name
for what is now known as Dacentrurus |
|
Onychosaurus |
|
"synonym of
Rhabdodon, or a dubious ankylosaurian " |
|
Opisthocoelicaudia |
|
|
| Oplosaurus |
|
|
| Orcomimus |
|
|
| Orinosaurus |
|
Junior synonym
(unneeded replacement name) of Orosaurus |
|
Ornatotholus |
|
|
|
Ornithodesmus |
|
|
| Ornithoides |
|
nomen nudum of
Saurornithoides |
|
Ornitholestes |
|
|
|
Ornithomerus |
|
Junior synonym of
Rhabdodon |
|
Ornithomimoides |
|
|
|
Ornithomimus |
|
|
| Ornithopsis |
|
|
|
Ornithosuchus |
|
Actually a
non-dinosaurian archosaur |
|
Ornithotarsus |
|
Possible junior
synonym of Hadrosaurus |
| Orodromeus |
|
|
| Orosaurus |
|
Possible junior
synonym of Euskelosaurus |
|
Orthogoniosaurus |
|
|
| Orthomerus |
|
|
|
Oryctodromeus |
|
|
|
Oshanosaurus |
|
nomen nudum |
|
Othnielia |
|
|
|
Othnielosaurus |
|
|
| Otogosaurus |
|
nomen nudum |
|
Ouranosaurus |
|
|
|
Oviraptor |
|
|
| Ovoraptor |
|
nomen nudum of
Velociraptor |
|
Ozraptor |
|
|
