title: Ejinhoro Formation
text: # 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.
  
  