Hastanectes
| Hastanectes Temporal range: Early Cretaceous,  | |
|---|---|
| Life restoration | |
| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Chordata | 
| Class: | Reptilia | 
| Superorder: | †Sauropterygia | 
| Order: | †Plesiosauria | 
| Family: | †Leptocleididae | 
| Genus: | †Hastanectes Benson et al., 2012 | 
| Type species | |
| †Hastanectes valdensis | |
Hastanectes is an extinct genus of a plesiosaurian with possible pliosaurid affinities known from the Early Cretaceous Wadhurst Clay Formation (Valanginian stage) of the United Kingdom. It contains a single species, Hastanectes valdensis, which was originally thought to be a species of Cimoliasaurus.