| suborder | lightly built medium-size theropods |
|---|---|
| suborder | widespread group including duck-billed dinosaurs and their early relatives (hadrosaurs |
| suborder | two names for the suborder of typical songbirds |
| suborder | extinct group of armored fishlike vertebrates |
| suborder | terrestrial game birds of the Old World and Australia: bustards |
| suborder | bone-headed dinosaurs |
| suborder | two names for the suborder of typical songbirds |
| suborder | in some classifications nearly or exactly equivalent to the Perciformes which are considered a suborder |
| suborder | lampreys as distinguished from hagfishes |
| suborder | seals |
| suborder | any of the plesiosaurs |
| suborder | the earliest known dinosaurs |