Centrosaurus

Centrosaurus was a horned ceratopsid dinosaur from Late Cretaceous Alberta, distinguished by a large nasal horn, short frill, and prominent frill spikes.

Ceratopsidae: Ceratopsidae is a family of horned, beaked dinosaurs that includes Centrosaurus and Triceratops. Centrosaurus belongs to this family of large-bodied herbivores with elaborate skulls.
Ceratopsian horns and frills: Ceratopsian horns and frills are bony skull structures that varied greatly among horned dinosaurs. Centrosaurus's horn and frill are central to competing explanations of ceratopsid display and defense.
Dinosaur Park Formation: The Dinosaur Park Formation is a Late Cretaceous rock unit in Alberta, Canada, rich in dinosaur fossils. Many of the best-known Centrosaurus specimens come from this formation.
Centrosaurus apertus: Centrosaurus apertus is the type species and best-known species of the genus Centrosaurus. Its fossils provide the basis for the genus's characteristic skeletal reconstruction.
Triceratops: Triceratops was a large Late Cretaceous ceratopsid with two long brow horns and a broad frill. Its long brow horns and different frill contrast with Centrosaurus's dominant nasal horn.
Centrosaurinae: Centrosaurinae is a ceratopsid subfamily whose members generally had prominent nasal horns and shorter frills. Centrosaurus is a defining member of this short-frilled, nose-horned branch.
Sexual selection: Sexual selection is evolutionary change driven by differences in mating success among individuals. It offers one explanation for the evolution of Centrosaurus's conspicuous skull ornamentation.
Oldman Formation: The Oldman Formation is a Late Cretaceous geological formation in southern Alberta, Canada. Centrosaurus fossils occur in this formation, extending its record beyond Dinosaur Park beds.
Centrosaurus bonebed: A Centrosaurus bonebed is a mass accumulation of fossils assigned to Centrosaurus, especially in Alberta. These deposits preserve abundant remains from which population-level behavior is inferred.
Styracosaurus: Styracosaurus was a centrosaurine ceratopsid with a long nasal horn and several long frill spikes. Its elaborate spikes make a striking comparison with Centrosaurus's shorter, differently arranged frill.

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