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Chaoyangsauridae

 

 
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Chaoyangsauridae
 
 
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Chaoyangsauridae is a family
Family (biology)

In biological classification, family is a taxonomic rank. Exact details of formal nomenclature depend on the Nomenclature Codes which applies....
 of dinosaur
Dinosaur

Dinosaurs were the dominant vertebrate animals of Landform ecosystems for over 160 million years, from the late Triassic Period until the end of the Cretaceous Period , when most of them became extinct in the Cretaceous?Tertiary extinction event....
s. They were the first marginocephalia
Marginocephalia

Marginocephalia is a clade of ornithischian dinosaurs that includes the thick-skulled pachycephalosauria, 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....
n dinosaurs to appear on the planet, about 150 million years ago, in the Late Jurassic
Late Jurassic

The Late Jurassic Epoch of the Jurassic Period is the unit of geologic time scale from 161.2 ? 4.0 to 145.5 ? 4.0 million years ago, which is preserved in Upper Jurassic stratum....
 period. Members of this group had sharp beaks for snipping off leaves to eat, and a very small frill. There are disagreements that the chaoyangsaurids were part of the pachycephalosauria
Pachycephalosauria

Pachycephalosauria is a clade of ornithischian dinosaurs. Well-known genera include Pachycephalosaurus, Stegoceras, Stygimoloch, and Dracorex....
n group, ceratopsia
Ceratopsia

Ceratopsia or Ceratopia is a group of herbivore, beaked dinosaurs which thrived in what are now North America and Asia, during the Cretaceous Period , although ancestral forms lived earlier, in the Jurassic....
n group, or a different ancestral group.

Two dinosaur genera, Chaoyangsaurus
Chaoyangsaurus

Chaoyangsaurus was a marginocephalian dinosaur from the Late Jurassic of China. Chaoyangsaurus belonged to the Ceratopsia , a group of primarily herbivorous dinosaurs with parrot-like beaks which thrived in North America and Asia during the Cretaceous Period ....
 and Xuanhuaceratops, are included in Chaoyangsauridae.






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Encyclopedia


Chaoyangsauridae is a family
Family (biology)

In biological classification, family is a taxonomic rank. Exact details of formal nomenclature depend on the Nomenclature Codes which applies....
 of dinosaur
Dinosaur

Dinosaurs were the dominant vertebrate animals of Landform ecosystems for over 160 million years, from the late Triassic Period until the end of the Cretaceous Period , when most of them became extinct in the Cretaceous?Tertiary extinction event....
s. They were the first marginocephalia
Marginocephalia

Marginocephalia is a clade of ornithischian dinosaurs that includes the thick-skulled pachycephalosauria, 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....
n dinosaurs to appear on the planet, about 150 million years ago, in the Late Jurassic
Late Jurassic

The Late Jurassic Epoch of the Jurassic Period is the unit of geologic time scale from 161.2 ? 4.0 to 145.5 ? 4.0 million years ago, which is preserved in Upper Jurassic stratum....
 period. Members of this group had sharp beaks for snipping off leaves to eat, and a very small frill. There are disagreements that the chaoyangsaurids were part of the pachycephalosauria
Pachycephalosauria

Pachycephalosauria is a clade of ornithischian dinosaurs. Well-known genera include Pachycephalosaurus, Stegoceras, Stygimoloch, and Dracorex....
n group, ceratopsia
Ceratopsia

Ceratopsia or Ceratopia is a group of herbivore, beaked dinosaurs which thrived in what are now North America and Asia, during the Cretaceous Period , although ancestral forms lived earlier, in the Jurassic....
n group, or a different ancestral group.

Two dinosaur genera, Chaoyangsaurus
Chaoyangsaurus

Chaoyangsaurus was a marginocephalian dinosaur from the Late Jurassic of China. Chaoyangsaurus belonged to the Ceratopsia , a group of primarily herbivorous dinosaurs with parrot-like beaks which thrived in North America and Asia during the Cretaceous Period ....
 and Xuanhuaceratops, are included in Chaoyangsauridae. Both animals are more primitive (or basal) than Psittacosaurus
Psittacosaurus

Psittacosaurus is a genus of psittacosaurid ceratopsian dinosaur from the Early Cretaceous Period of what is now Asia, about 130 to 100 million years ago....
, an early ceratopsian.

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