| Ceratosaurs Fossil range: Jurassic-Cretaceous |
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Ceratosaurs are a group of theropod dinosaurs defined as all theropods sharing a more recent common ancestry with Ceratosaurus than with birds. The Jurassic is a geologic period and system that extends from about Ma (million years ago to Ma that is from the end of the Triassic to the beginning The Cretaceous (kriːˈteɪʃəs, usually abbreviated 'K' for its German translation "Kreide" is a geologic period and system, reaching from the end of Chordates ( Phylum Chordata) are a group of Animals that includes the Vertebrates together with several closely related Invertebrates Reptiles, or members of the class Reptilia are air-breathing Cold-blooded Vertebrates that have skin covered in scales as opposed to hair or feathers Saurischia (sɔːˈrɪskiə, from the Greek sauros ( σαυρος) meaning 'lizard' and ischion ( ισχιον) meaning 'hip joint' Theropods (ˈθɪərəpɒd theropoda /θiːˈrɒpədə/ 'beast feet' are a group of Bipedal Saurischian Dinosaurs Although they were primarily Othniel Charles Marsh ( October 29, 1831 &ndash March 18, 1899) was one of the pre-eminent Paleontologists of the 19th century who In Biological classification, family ( Latin Abelisauridae (meaning "Abel's lizards" is a family (or Clade) of Ceratosaurian Theropod Dinosaurs Abelisaurids thrived Ceratosauridae is a Family of Theropod Dinosaurs belonging to the Infraorder Ceratosauria. Noasaurids were a group of Theropod Dinosaurs from the Cretaceous Period Theropods (ˈθɪərəpɒd theropoda /θiːˈrɒpədə/ 'beast feet' are a group of Bipedal Saurischian Dinosaurs Although they were primarily Ceratosaurus (ˌsɛrətəˈsɔrəs meaning 'horned lizard' in reference to the horn on its nose ( Greek κερας/κερατος keras/keratos meaning 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. Ceratosaurus (ˌsɛrətəˈsɔrəs meaning 'horned lizard' in reference to the horn on its nose ( Greek κερας/κερατος keras/keratos meaning Elaphrosaurus (meaning "lightweight lizard" is a Genus of carnivorous Theropod Dinosaur from the late Jurassic Abelisaurus (əˌbɛlɨˈsɔrəs "Abel's lizard" is a Genus of Abelisaurid Theropod Dinosaur from the Late Cretaceous Traditionally, Ceratosauria included the above dinosaurs plus the Late Triassic to Early Jurassic Coelophysoidea (Coelophysis, Dilophosaurus, etc. Coelophysoids were common Dinosaurs of the Late Triassic and Early Jurassic periods Coelophysis (siːˈloʊfaɪsɨs see-LOH-fye-siss meaning "hollow form " in reference to its hollow Bones ( Greek κοιλος Dilophosaurus was a Theropod Dinosaur from the Early Jurassic Period. ), 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. A clade is a taxonomic group comprising a single Common ancestor and all the descendants of that ancestor
Taxonomy
- Infraorder Ceratosauria
- Chuandongocoelurus
- Elaphrosaurus
- ?Lukousaurus
- Family Ceratosauridae
- Superfamily Abelisauroidea
- Genusaurus
- Ozraptor
- Spinostropheus
- Tarascosaurus
- Family Abelisauridae
- Family Noasauridae
External links
- Ceratosauria at DinoData
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