Deinodon

- Other Names: Tyrannosaurus
- Pronunciation: DYE-no-don
- Translation: Terrible Tooth
- Order: Saurischia
- Suborder: Theropoda
- Infraorder: Tetanurae
- Micro-order: Carnosauria
- Family: Tyrannosauridae
- Period: Late Cretaceous
- Description: Carnivore, Bipedal
- Notes: Deinodon is known from fragmentary remains. Joseph Leidy,an anatomist from Philadelphia, named the first American dinosaurs in 1856 based on fossils brought back from Montana by Ferdinand Hayden.Leidy identified a jaw and 12 enormous teeth as belonging to a ferociousmegalosaurid he christened Deinodon horridus. Upon further analysisof the remains since Deinodon's discovery, the dinosaur was determinedto actually be Tyrannosaurus, making Deinodon an invalid dinosaur.