marginocephalia การใช้

The fused mandibular symphysis might indicate a relation with the Marginocephalia.
The frills evolved from the shelf common to all Marginocephalia.
Pachycephalosaurs are today grouped with the horned ceratopsians in the group Marginocephalia . " Stegoceras " itself has been considered Fruitland and Kirtland Formation.
But paleontologists Richard J . Butler and Robert M . Sullivan nonetheless view the species as being Marginocephalia " incertae sedis ", rejecting the presumed synapomorphies with the Pachycephalosauria as incorrect identifications or lacking cogency because of a possible presence in ceratopsian groups.