It currently contains Adelolophus (from Utah), possibly Angulomastacator (from Texas), Charonosaurus (from China), Parasaurolophus (from Utah, New Mexico, China and Alberta) and Tlatolophus (from Mexico).
This collection includes Adelolophus (from Utah), possibly Angulomastacator (from Texas), Charonosaurus (from China), Parasaurolophus (from Utah, New Mexico, China and Alberta) and Tlatolophus (from Mexico).