A New Genus of Psittacosauridae (Dinosauria: Ornithopoda) and the Origin and Early Evolution of Marginocephalian Dinosaurs

  title={A New Genus of Psittacosauridae (Dinosauria: Ornithopoda) and the Origin and Early Evolution of Marginocephalian Dinosaurs},
  author={You Hailu and Xu Xing and Wang Xiaolin},
  journal={Acta Geologica Sinica ‐ English Edition},
Abstract  An almost complete juvenile dinosaur skull with lower jaw was discovered from the Early Cretaceous Yixian Formation in Beipiao, Liaoning Province, China. Here, the specimen is described and a cladistic analysis is performed in order to find its phylogenetic relationships. The result shows that this specimen represents a new genus of Psittacosauridae, Hongshanosaurus houi, gen. et sp. nov., and confirms the monophyletic status for Ceratopsia and Marginocephalia. However… 

A New Ornithischian Dinosaur from the Lower Cretaceous Kuwajima Formation of Japan

ABSTRACT A new ornithischian dinosaur, Albalophosaurus yamaguchiorum gen. et sp. nov., is described on the basis of a partial skull and lower jaw recovered from the Lower Cretaceous Kuwajima

An Adult Specimen of Hongshanosaurus houi (Dinosauria: Psittacosauridae) from the Lower Cretaceous of Western Liaoning Province, China

Abstract A new specimen consisting of a complete skull and lower jaw was discovered from the Lujiatun bed of the Lower Cretaceous Yixian Formation in the Lujiatun site, Beipiao, western Liaoning

Taxonomy, Cranial Morphology, and Relationships of Parrot-Beaked Dinosaurs (Ceratopsia: Psittacosaurus)

in 1922, well-preserved fossils of the first parrotbeaked dinosaur were discovered in Early Cretaceous horizons in the Gobi Desert of Mongolia. Now referred to a single species, Psittacosaurus

A New Troodontid (Theropoda: Troodontidae) from the Lower Cretaceous Yixian Formation of Western Liaoning, China

A specimen collected from the Lower Cretaceous Yixian Formation of western Liaoning, China, represents a new genus and species of troodontid theropod, indicating a rapid evolution at the base of the Troodontidae.

A New Ceratopsian from the Upper Jurassic Houcheng Formation of Hebei, China

Abstract  A new ceratopsian taxon Xuanhuaceratops niei gen. et sp. nov. is erected based on four fragmentary specimens collected from the Late Jurassic Houcheng Formation, Hebei Province, China.

The anatomy of the basal ornithischian dinosaur Eocursor parvus from the lower Elliot Formation (Late Triassic) of South Africa

  • R. Butler
  • Environmental Science, Geography
  • 2010
Eocursor may represent the sister taxon to Genasauria, the clade that includes most of ornithischian diversity, although this phylogenetic position is partially dependent upon the uncertain phylogenetically position of the enigmatic and controversial clade Heterodontosauridae.

Cranial Anatomy of the Small Ornithischian Dinosaur Changchunsaurus parvus from the Quantou Formation (Cretaceous: Aptian-Cenomanian) of Jilin Province, Northeastern China

ABSTRACT The Quantou Formation of Jilin Province, People's Republic of China, has recently yielded an important new fauna of ‘middle’ Cretaceous vertebrates. This fauna includes the small-bodied

Therizinosauroidea) from the Lower Cretaceous Yixian Formation

Pygostyle was previously considered as a unique structure of ornithothoracine birds, used to maneuver tail feathers. A similar structure from an oviraptorosaurian dinosaur was considered functionally

A New Species of the Ankylosaurid Dinosaur Crichtonsaurus (Ankylosauridae: Ankylosauria) from the Cretaceous of Liaoning Province, China

Abstract: A new ankylosaurid species of Crichtonsaurus, C. benxiensis sp. nov., is erected based on a well preserved skeleton and a nearly complete skull found in the Sunjiawan Formation

Notes on the postcranial anatomy of the heterodontosaurid dinosaur Heterodontosaurus tucki, a basal ornithischian from the Lower Jurassic of South Africa

A description is provided of the best-represented adult postcranial skeleton of the Heterodontosauridae Kuhn, 1966 (rather than Romer, 1966), that of Heterodontosaurus tucki Crompton & Charig, 1962



New psittacosaur occurrences in Inner Mongolia

Psittacosaur materials were collected from seven localities in the course of Dinosaur Project fieldwork in Inner Mongolia. Two new species of Psittacosaurus are recognized, bringing the number of

Psittacosaurus meileyingensis (Ornithischia: Ceratopsia), a new psittacosaur from the Lower Cretaceous of northeastern China

ABSTRACT A new psittacosaur species, Psittacosaurus meileyingensis, is based on a well preserved skull with referred cranial and postcranial remains. The skull is tall relative to its length and has

The evolution of dinosaurs.

  • P. Sereno
  • Environmental Science, Geography
  • 1999
The ascendancy of dinosaurs on land near the close of the Triassic now appears to have been as accidental and opportunistic as their demise and replacement by therian mammals at the end of the

Cretaceous age for the feathered dinosaurs of Liaoning, China

The results of this dating study indicate that the lower Yixian fossil horizons are not Jurassic but rather are at least 20 Myr younger, placing them within middle Early Cretaceous time.

Biostratigraphy and avian origins in northeastern China

The Late Jurassic age frequently attributed to fossils from the Yixian Formation (Liaoning and Hebei provinces, People’s Republic of China), including theropod dinosaurs with feathers or

On the Dinosauria

The Horned Dinosaurs

FROM time to time mention has been made in the columns of NATURE of contributions to our knowledge of what are perhaps the most wonderful members of a wonderful order, namely, the horned dinosaurs,


  • 1990

Phylogeny of the bird-hipped dinosaurs (Order Omithischia)

  • N ~ tioml Geographic Research
  • 1986