Juvenile
Fully-toothed (Stage I: 42 teeth; Stage II: 34 teeth)Curved quadrate shaftDentary anterior end straightNo gastroliths
Adult
Completely toothless (Stage IV & V)Straight quadrate shaftDentary anterior end downturnedGastroliths present
Limusaurus inextricabilis
Completely toothless
(Stage IV & V)Straight quadrate shaftDentary anterior end
downturnedGastroliths present