| Marginocephalia Fossil range: Late Jurassic–Late Cretaceous 156-65 Ma | |
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 Skull of Triceratops. | |
| Scientific classification
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Subdivisions: |
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Marginocephalia ("fringed heads") is a clade of ornithischian dinosaurs that includes the thick-skulled pachycephalosaurids, and horned ceratopsians. They were all herbivores, walking on two or four legs, and are characterized by a bony ridge or frill the back of the skull. The clade evolved in the Jurassic period, and became common in the Upper Cretaceous.
Phylogeny[]
The cladogram below follows a 2009 analysis by Zheng and colleagues.[1]
| Marginocephalia |
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References[]
- ^ Zheng, X-.T., You, H.-L., Xu, X. and Dong, Z.-M. (2009). "An Early Cretaceous heterodontosaurid dinosaur with filamentous integumentary structures." Nature, 458(19): 333-336.
