In 1964 Young created a family to place the recently found Chinese genus Dsungaripterus. Later on, also Noripterus (then now with the name "Phobetor" which was already occupied, therefore the quotation marks) were assigned to the family. Also Domeykodactylus and Lonchognathosaurus were assigned to the group. They are medium-sized forms, adapted to eating hard-shelled creatures, which they grind with their flat teeth. In the same year, David Unwin gave a slightly different definition: the last common ancestor of Dsungaripterus weii and Noripterus complicidens, and all its descendants.[5]