Definition
A "marginocephalian" is any dinosaur belonging to the Marginocephalia clade, characterized by a bony shelf or ridge at the back of its skull. 𦴠This group encompasses both pachycephalosaurs (bone-headed dinosaurs) and ceratopsians (horned dinosaurs). Imagine them as members of a club where everyone has a unique headgear. They thrived during the Late Cretaceous period. Understanding this classification helps to organize dinosaur diversity.