Platyognathus
| Platyognathus Temporal range: Sinemurian,  | |
|---|---|
| Referred specimen (CUP 2083) in the Field Museum of Natural History | |
| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Chordata | 
| Class: | Reptilia | 
| Clade: | Archosauria | 
| Clade: | Pseudosuchia | 
| Clade: | Crocodylomorpha | 
| Superfamily: | †Gobiosuchoidea | 
| Genus: | †Platyognathus Young, 1944 | 
| Species: | †P. hsui | 
| Binomial name | |
| †Platyognathus hsui Young, 1944 | |
Platyognathus is an extinct genus of crocodyliform of the superfamily Gobiosuchoidea, representing the oldest representative of such, leaving a ghost lineage of aprox. 67 million years. Fossils are known from the Early Jurassic (Sinemurian) Zhangjiawa Member of the Lower Lufeng Formation in Yunnan, China and belong to the type and only species, P. hsui.