Itapeuasaurus
| Itapeuasaurus Temporal range: Late Cretaceous,  | |
|---|---|
| Skeletal reconstruction of the holotype specimen (UFMA. 1.10.1960a), with unknown elements based on Demandasaurus | |
| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Chordata | 
| Clade: | Dinosauria | 
| Clade: | Saurischia | 
| Clade: | †Sauropodomorpha | 
| Clade: | †Sauropoda | 
| Superfamily: | †Diplodocoidea | 
| Family: | †Rebbachisauridae | 
| Subfamily: | †Rebbachisaurinae | 
| Genus: | †Itapeuasaurus Lindoso et al. 2019 | 
| Type species | |
| †Itapeuasaurus cajapioensis Lindoso et al. 2019 | |
Itapeuasaurus (meaning "Itapeua lizard") is a genus of rebbachisaurid sauropod dinosaur from the Alcântara Formation (Itapecuru Group) of Maranhão in Brazil. The type and only species is Itapeuasaurus cajapioensis. It is the most complete Cenomanian-aged diplodocoid known from South America and it is also the first reported Cenomanian-aged rebbachisaurid discovered in South America.