Dianmeisaurus
| Dianmeisaurus Temporal range: Middle Triassic,  | |
|---|---|
| Holotype specimen of D. mutaensis, likely representing an immature individual | |
| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Chordata | 
| Class: | Reptilia | 
| Superorder: | †Sauropterygia | 
| Suborder: | †Pachypleurosauria | 
| Genus: | †Dianmeisaurus Shang & Li, 2015 | 
| Type species | |
| †Dianmeisaurus gracilis Shang & Li, 2015 | |
| Other species | |
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Dianmeisaurus is an extinct genus of pachypleurosaur from the Middle Triassic Guanling Formation in China. The type species is D. gracilis. An additional species, D. mutaensis, was named in 2024 based on a small skeleton likely belonging to an immature individual.