Ejinhoro Formation
# Ejinhoro Formation

The Ejinhoro Formation (simplified Chinese: 伊金霍洛组; traditional Chinese: 伊金霍洛組; pinyin: Yījīnhuòluò Zǔ) is a geological formation in Inner Mongolia, north China, whose strata date back to the Early Cretaceous period (Aptian/Albian age.

Dinosaur remains are among the fossils that have been recovered from the formation.

## Fossil content

### Mammals

Mammals :

| Taxa | Presence | Notes | Images |
| - | - | - | - |
| Genus: Hangjinia H. chowi | A single dentary | A gobiconodontid | |

### Dinosaurs

Dinosaurs :

| Taxa | Presence | Notes | Images |
| - | - | - | - |
| Genus: Chiayusaurus C. sp. | Isolated teeth. | A sauropod. | Sinornithoides Wuerhosaurus |
| Psittacosaurus P. neimongoliensis P. ordosensis | | A ceratopsian. "[One] nearly complete skeleton and other fragmentary material." "Partial cranial material." | Sinornithoides Wuerhosaurus |
| Saurischia indeterminate | | A large saurischian. | Sinornithoides Wuerhosaurus |
| Sinornithoides S. youngi | "Near-complete articulated skeleton." | A troodontid. | Sinornithoides Wuerhosaurus |
| Stegosauridae indeterminate | Isolated teeth. | A stegosaurid. | Sinornithoides Wuerhosaurus |
| Wuerhosaurus W. ordosensis | | A large stegosaurid. "Partial skeleton, plate, vertebra, adult." | Sinornithoides Wuerhosaurus |

### Pterosaurs

Indeterminate pterosaur remains have also been recovered from the formation.

