Telmatosaurus
| Telmatosaurus Temporal range: Maastrichtian,  | |
|---|---|
| Holotype skull | |
| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Chordata | 
| Clade: | Dinosauria | 
| Clade: | †Ornithischia | 
| Clade: | †Ornithopoda | 
| Clade: | †Hadrosauromorpha | 
| Genus: | †Telmatosaurus Nopcsa, 1903 | 
| Type species | |
| †Telmatosaurus transsylvanicus | |
| Synonyms | |
| 
 | |
Telmatosaurus (meaning "marsh lizard") is a genus of basal hadrosauromorph dinosaur from the Late Cretaceous of Romania. It was a relatively small hadrosaur, measuring approximately 5 m (16 ft) in length and 600 kg (1,300 lb) in body mass, which has been explained as an instance of insular dwarfism.