Cerapoda
| Cerapods Temporal range: Middle Jurassic–Late Cretaceous, 169–65.5 Ma |
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| Skulls of cerapod dinosaurs | |
Scientific classification  |
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| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Superorder: | Dinosauria |
| Order: | †Ornithischia |
| Branch: | †Neornithischia |
| Node: | †Cerapoda Sereno, 1986 |
| Subgroups | |
Cerapoda ("ceratopsians and ornithopods") is a clade of the dinosaur order Ornithischia.
[edit] Classification
Cerapoda is divided into two groups: Ornithopoda ("bird-foot") and Marginocephalia ("fringed heads"). The later group includes the Pachycephalosauria ("thick-headed lizards") and Ceratopsia ("horned faces"). The following taxonomy follows Richard J. Butler, Paul Upchurch and David B. Norman, 2008 (and Butler et al., 2011) unless otherwise noted.[1][2]
Cerapoda was first named by Sereno in 1986 and defined by him as "Parasaurolophus walkeri Parks, 1922, Triceratops horridus Marsh, 1889, their most recent common ancestor and all descendents".[1] The cladogram below follows a 2011 analysis by paleontologists Richard J. Butler, Jin Liyong, Chen Jun and Pascal Godefroit.[2]
| Cerapoda |
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In addition, there are some species which are difficult to classify in either the marginocephalian or ornithopod lineages, such as Albalophosaurus yamaguchiorum, which is considered Cerapoda incertae sedis (uncertain placement).[3]
[edit] References
- ^ a b Richard J. Butler, Paul Upchurch and David B. Norman (2008). "The phylogeny of the ornithischian dinosaurs". Journal of Systematic Palaeontology 6 (1): 1–40. doi:10.1017/S1477201907002271.
- ^ a b Richard J. Butler, Jin Liyong, Chen Jun, Pascal Godefroit (2011). "The postcranial osteology and phylogenetic position of the small ornithischian dinosaur Changchunsaurus parvus from the Quantou Formation (Cretaceous: Aptian–Cenomanian) of Jilin Province, north-eastern China". Palaeontology 54 (3): 667–683. doi:10.1111/j.1475-4983.2011.01046.x.
- ^ Ohashi, T., and Barrett, P.M. (2009). "A new ornithischian dinosaur from the Lower Cretaceous Kuwajima Formation of Japan". Journal of Vertebrate Paleontology (Society of Vertebrate Paleontology) 29 (3): 748-7. doi:10.1671/039.029.0306.
- Butler, R.J. (2005). Zoological Journal of the Linnean Society. 145. p. 175-18.
- Sereno, P.C. (1986). "Phylogeny of the bird-hipped dinosaurs (order Ornithischia)". National Geographic Research 2 (2): 234–56.
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