An atoposaurid neosuchian (Archosauria: Crocodyliformes) from the Lower Cretaceous of Inner Mongolia (People's Republic of China)

1996 ◽  
Vol 33 (4) ◽  
pp. 599-605 ◽  
Author(s):  
X.-C. Wu ◽  
H.-D. Sues ◽  
D. B. Brinkman
Keyword(s):  
Lower Cretaceous ◽  
Inner Mongolia ◽  
Ordos Basin ◽  
Upper Jurassic ◽  
People’S Republic Of China ◽  
People's Republic Of China ◽  
Republic Of China ◽  
Postcranial Remains ◽  
New Material ◽  
The Ordos Basin

Cranial and postcranial remains from the Laolonghuoze locality in the Ordos Basin, Inner Mongolia (China), represent a previously unrecorded taxon of crocodyliform archosaurs from the Lower Cretaceous Luohandong Formation (Zhidan Group). Several cranial features indicate that this form is referable to the Atoposauridae, which were previously definitely known only from the Upper Jurassic and Lower Cretaceous of Europe. Certain derived characters further indicate that the Ordos material is closely related to, if not actually referable to, Theriosuchus. The Ordos atoposaurid differs from the species of Theriosuchus in only a few features. In view of its fragmentary nature, the new material is identified as cf. Theriosuchus sp. at present.

A new species of stegosaur (Dinosauria) from the Ordos Basin, Inner Mongolia, People's Republic of China

1993 ◽  
Vol 30 (10) ◽  
pp. 2174-2176 ◽  
Author(s):  
Zhi-Ming Dong
Keyword(s):  
New Species ◽  
Lower Cretaceous ◽  
Inner Mongolia ◽  
Ordos Basin ◽  
People’S Republic Of China ◽  
People's Republic Of China ◽  
Republic Of China ◽  
The Ordos Basin ◽  
The Right ◽  
A New Species

In 1988, an incomplete skeleton of a stegosaurian dinosaur was found in Lower Cretaceous strata of the Ordos Basin of China by the Dinosaur Project (China – Canada – Alberta – Ex Terra). The material includes an articulated series of vertebrae from the last three cervicals to the first five caudals, and the right ilium. The specimen is identified as a new species called Wuerhosaurus ordosensis. It is the only Lower Cretaceous stegosaur known with an articulated series of dorsal vertebrae, which have been reduced to eleven in number.

A Lower Cretaceous enantiornithine bird from the Ordos Basin of Inner Mongolia, People's Republic of China

1993 ◽  
Vol 30 (10) ◽  
pp. 2177-2179 ◽  
Author(s):  
Zhi-Ming Dong
Keyword(s):  
Early Cretaceous ◽  
Lower Cretaceous ◽  
Inner Mongolia ◽  
Ordos Basin ◽  
People’S Republic Of China ◽  
People's Republic Of China ◽  
Republic Of China ◽  
The Ordos Basin

The discovery of an Early Cretaceous bird from the Ordos Basin of Inner Mongolia (People's Republic of China) is reported. The specimen, collected by the Dinosaur Project (China – Canada – Alberta – Ex Terra) Expedition of 1990, includes scapulocoracoids, humeri, radii, ulnae and metacarpals. It is referred to the Enantiornithes.

New material of Ikechosaurus sunailinae (Reptilia: Choristodira) from the Early Cretaceous Laohongdong Formation, Ordos Basin, Inner Mongolia, and the interrelationships of the genus

1993 ◽  
Vol 30 (10) ◽  
pp. 2153-2162 ◽  
Author(s):  
Donald B. Brinkman ◽  
Zhi-Ming Dong
Keyword(s):  
Early Cretaceous ◽  
Inner Mongolia ◽  
Ordos Basin ◽  
Temporal Region ◽  
Republic Of China ◽  
Skull Roof ◽  
Anterior Position ◽  
Anterior Extension ◽  
New Material ◽  
The Ordos Basin

New material of Ikechosaurus sunailinae from the Early Cretaceous Laohongdong Formation of the Ordos Basin, Inner Mongolia, People's Republic of China, is described. This material, which includes well-preserved articulated skeletons and a series of isolated elements, demonstrates that Ikechosaurus is more closely related to Champsosaurus than to Simoedosaurus, sharing with Champsosaurus the presence of an elongate snout, anteriorly constricted parasphenoid with the foramen canalis caroticus internus located in or near the suture between the parasphenoid and the pterygoid, an anterior extension of the anterior end of the jugal, and an elongate symphysis including the splenial. Ikechosaurus is primitive relative to Champsosaurus in the anterior position of the internal narial openings, in the less strongly flared temporal region with the temporal openings placed largely above one another, in the absence of fenestra in the occiput between the parietal and squamosal, and in the interpterygoid vacuity bordered posteriorly by the basisphenoid. Ikechosaurus and Tchoiria are at a similar grade of evolution, but can be separated by details in the arrangement of bone forming the skull roof.

New material of Dracochelys (Eucryptodira: Sinemydidae) from the Junggar Basin, Xinjiang, People's Republic of China

2001 ◽  
Vol 38 (12) ◽  
pp. 1645-1651 ◽  
Author(s):  
Donald B Brinkman
Keyword(s):  
Junggar Basin ◽  
People’S Republic Of China ◽  
Postcranial Skeleton ◽  
People's Republic Of China ◽  
Republic Of China ◽  
Close Relationship ◽  
New Material

A new specimen of Dracochelys bicuspis documents the lower jaws and postcranial skeleton of this taxon. A close relationship with Hangaiemys is supported by the presence of nine neural bones, with the sulcus between the fourth and fifth vertebral scute crossing the ninth neural. The two taxa differ in the contacts of the first peripheral, shape of the vertebral scutes, and pattern of fenestration of the plastron. Dracochelys differs from "Sinemys" wuerhoensis and "S. " efremovi, which also occur in the Tugulu Group, in features of the carapace, especially the arrangement of the posterior neurals and suprapygals.

New information on Cretaceous troodontids (Dinosauria, Theropoda) from the People's Republic of China

2001 ◽  
Vol 38 (12) ◽  
pp. 1753-1766 ◽  
Author(s):  
Philip J Currie ◽  
Dong Zhiming
Keyword(s):  
North America ◽  
Lower Cretaceous ◽  
People’S Republic Of China ◽  
Phylogenetic Position ◽  
People's Republic Of China ◽  
Republic Of China ◽  
New Information

Troodontid specimens were recovered from three localities in China by the Sino-Canadian expeditions between 1987 and 1990. These include a Lower Cretaceous form (Sinornithoides youngi), which is the most complete troodontid skeleton ever found, isolated bones from the Iren Dabasu Formation (?Turonian), and partial skeletons of Saurornithoides mongoliensis from Djadokhta-equivalent beds (?Campanian). These, and other specimens recently described from North America, allow a better assessment of the phylogenetic position of troodontids than has been possible before. Although troodontids have autapomorphies that eliminate them from consideration as bird ancestors, they are nevertheless one of the closest avian outgroups within the Theropoda.

A nearly complete skeleton of a new troodontid dinosaur from the Early Cretaceous of the Ordos Basin, Inner Mongolia, People's Republic of China

1993 ◽  
Vol 30 (10) ◽  
pp. 2163-2173 ◽  
Author(s):  
Dale A. Russell ◽  
Zhi-Ming Dong
Keyword(s):  
Early Cretaceous ◽  
Inner Mongolia ◽  
Hind Limb ◽  
New Genus ◽  
Ordos Basin ◽  
New Genus And Species ◽  
Republic Of China ◽  
Vertebral Count ◽  
The Ordos Basin ◽  
Orbital Rim

An articulated skeleton of a 1 m long theropod from Early Cretaceous strata in Inner Mongolia is clearly referrable to the Troodontidae, representing the most complete specimen known of this group of small carnivorous dinosaurs. The tail and neck of the animal were curled next to its body upon burial; the upper surface of the skeleton was badly damaged by erosion. Previously unknown details of troodont morphology include a quadratic contact with the braincase wall (forming part of a channel leading to the lateral depression), a presacral vertebral count possibly similar to that of most theropods, absence of ossified caudal tendons, presence of a rod-like clavicle, and absence of sternal ossifications. A new genus and species (Sinornithoides youngi n.gen., n.sp.) is established for the specimen on the basis of its short skull, laterally directed orbital rim of the frontal, and elongated hind limb. A reassessment of character distributions in other small theropods and primitive birds must be completed before troodontid affinities can be established with greater precision.

The affinities of a new theropod from the Alxa Desert, Inner Mongolia, People's Republic of China

1993 ◽  
Vol 30 (10) ◽  
pp. 2107-2127 ◽  
Author(s):  
Dale A. Russell ◽  
Zhi-Ming Dong
Keyword(s):  
Early Cretaceous ◽  
Inner Mongolia ◽  
Junior Synonym ◽  
People’S Republic Of China ◽  
New Taxon ◽  
People's Republic Of China ◽  
Republic Of China ◽  
Short Tail ◽  
Skeletal Reconstruction

Remains of bipedal saurischians from lacustrine strata of Albian age in the Alxa ("Alashan") Desert of Inner Mongolia represent a new taxon and the most complete remains of an Early Cretaceous theropod so far discovered in Asia. A skeletal reconstruction generally resembles that of a moderately large prosauropod with long arms and a short tail. However, in its detailed morphology the reptile appears to be close to the ancestry of the Therizinosauridae Maleev, 1954 (for which Segno-sauridae Perle, 1979 is probably a junior synonym). These theropods are best referred to the Tetanurae of Gauthier, 1986. However, a provisional analysis of the distribution of therizinosauroid characters within tetanurans suggests the existence of two subordinate groups: the Carnosauria (Allosaurus, dromaeosaurids, and tyrannosaurids) and the Oviraptorosauria (including therizinosauroids, ornithomimids, troodontids, and oviraptorids).

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