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iCeratosaurs
Fossil range: Jurassic-Cretaceous
Conservation status
Extinct (fossil)
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Sauropsida
Order: Saurischia
Suborder: Theropoda
Infraorder: Ceratosauria
Marsh, 1884
Families

Elaphrosauridae
Ceratosauridae
Noasauridae
Abelisauridae

File:Ceratosaurus.jpg

Ceratosaurs are a group of theropod dinosaurs defined as all theropods sharing a more recent common ancestry with Ceratosaurus than with birds. There is presently no universally agreed upon listing of species or diagnostic characters of Ceratosauria. According to one theory, Ceratosauria includes the Late Jurassic to Late Cretaceous theropods Ceratosaurus, Elaphrosaurus, and Abelisaurus, found primarily (though not exclusively) in the southern hemisphere. Traditionally, Ceratosauria included the above dinosaurs plus the Late Triassic to Early Jurassic Coelophysoidea (Coelophysis, Dilophosaurus, etc.), implying a much earlier divergence of ceratosaurs from other theropods. However, most recent studies have shown that coelophysoids do not form a clade with other ceratosaurs, and should be excluded from this group.

Classification

External links


Smallwikipedialogo.png This page uses content from Wikipedia. The original article was at Ceratosauria. The list of authors can be seen in the page history. As with Paleontology Wiki, the text of Wikipedia is available under the GNU Free Documentation License.

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