Centrosaurus apertus, a large bodied ceratopsid from the Late Cretaceous of North America,
is one of the most common fossils recovered from the Belly River Group. This fossil record
shows a wide diversity in morphology and size, with specimens ranging from putative
juveniles to fully-grown individuals. The goal of this study was to reconstruct the ontogenetic
changes that occur in the craniofacial skeleton of C. apertus through a quantitative cladistic
analysis. Forty-seven cranial specimens were independently coded in separate data�…