An isolated dinosaurian prootic with possible stegosaurian affinities (Dinosauria: Thyreophora) from the Upper Jurassic Qigu Formation of the southern Junggar Basin, NW-China

2019 ◽  
Vol 294 (3) ◽  
pp. 275-283 ◽  
Author(s):  
Michael W. Maisch ◽  
Andreas T. Matzke

An isolated right prootic of a dinosaur is described from the lower Qigu Formation (Upper Jurassic) of Liuhuanggou, Xinjiang Uygur Autonomous Region, People's Republic of China. It is phenetically closest to the prootics of well-known stegosaurids, such as Stegosaurus and Kentrosaurus. Based on this resemblance as well as the co-occurrence of diagnostic stegosaurian material in the same assemblage, the element may represent a stegosaur. If correctly identified, it would be the third stegosaurian record from the southern Junggar Basin.

2020 ◽  
Vol 295 (1) ◽  
pp. 91-100 ◽  
Author(s):  
Michael W. Maisch ◽  
Andreas T. Matzke

Two small theropod teeth from the Qigu Formation of Liuhuanggou, Xinjiang Uygur Autonomous Region, People's Republic of China are described. They are compared to hitherto known finds of theropod teeth from both the northern and southern Junggar Basin. It is concluded that they cannot be confidently referred to any morphotype hitherto known from the Upper Jurassic of the Junggar Basin. Although the teeth agree well in principal measurements with material previously described and referred to basal tetanurans or basal tyrannosauroids (morphotype 4 of Han et al. 2011), they are both considerably smaller and show the distinctive feature of a lingually displaced mesial carina. The latter feature is shared with Dromaeosaurus albertensis and an unnamed dromaeosaur from the Lower Cretaceous of Spain and Denmark. It is therefore concluded that the material possibly represents a dromaeosaurid close to these taxa. It is the first record of putative dromaeosaurid theropods from the southern Junggar Basin. As dromaeosaurids have been previously announced from the Upper Jurassic of the northern Junggar Basin, this further underlines general similarity in the Upper Jurassic dinosaurian faunas between these areas.


1997 ◽  
Vol 71 (S47) ◽  
pp. 1-43 ◽  
Author(s):  
N. Gary Lane ◽  
Johnny A. Waters ◽  
Christopher G. Maples

Famennian (Late Devonian) echinoderm faunas are poorly known on a global basis, although reasonably diverse faunas have been reported from England and Germany. We have collected a diverse (>500 specimens representing approximately 30 taxa) Famennian echinoderm fauna dominated by blastoids and inadunate, small-calyx camerate, and flexible crinoids from the Hongguleleng Formation, Junggar Basin, Xinjiang–Uygur Autonomous Region, People's Republic of China. Taxa reported here include five new genera and six new species of blastoids along with one new genus and 19 new species of crinoids. Blastoid taxa include Junggaroblastus hoxtolgayensis new genus and species, Orophocrinus devonicus new species, Xinjiangoblastus ornatus new genus and species, Uyguroblastus conicus new genus and species, Sinopetaloblastus jinxingae new genus and species, and Houiblastus devonicus new genus and species. Crinoid taxa include Uperocrinus zhaoae new species, ?Hexacrinites species, Agathocrinus junggarensis new species, Chinacrinus xinjiangensis new genus and species, ?C.nodosus new genus and species, C. species A, C. species B, C. species C, Eutaxocrinus chinaensis new species, E. boulongourensis new species, E. basellus new species, Forbesiocrinus inexpectans new species, Deltacrinus asiaticus new species, Bridgerocrinus minutus new species, B. delicatulus new species, Cosmetocrinus parvus new species, ?Pachylocrinus subpentagonalis new species, “Decadocrinus” constrictus new species, “D.” elongatus new species, “D.” rugosus new species, “D.” usitatus new species, “D.” xinjiangensis new species, ?Graphiocrinus species, Holcocrinus asiaticus new species, and four species of inadunate crinoids that could not be assigned to genera. This fauna is more abundant and diverse than all other Famennian echinoderm faunas in the world combined, and it is critical in understanding echinoderm biogeography and evolution in the aftermath of the Late Devonian extinction event(s) prior to the Carboniferous echinoderm diversification. This echinoderm fauna is “Carboniferous” in affinity and indicates that echinoderm diversification and reradiation were well underway before the close of the Famennian.


2022 ◽  
Vol 68 (01/2022) ◽  
Author(s):  
Maidinaimu·Aibibula ◽  
Bin Li ◽  
Jiaoyu Shan ◽  
Fengming Tian ◽  
Jiahui Fan ◽  
...  

1999 ◽  
Vol 73 (3) ◽  
pp. 380-388 ◽  
Author(s):  
J. Keith Rigby ◽  
Johnny A. Waters ◽  
Christopher G. Maples ◽  
N. Gary Lane ◽  
Liao Zhou-Ting ◽  
...  

A modest assemblage of hexactinellid and calcareous sponges from the Pennsylvanian (Moscovian) Dikanre Formation has been recovered from the Uygur Autonomous Region in eastern Xinjiang Province in northwestern China. Hexactinellids include the reticulosid Stereodictyum proteron Rigby and Washburn, 1972, and the new amphidiscosid species Stioderma sinensis, S. micra, and S. mega. This is the first time the genera Stereodictyum and Stioderma have been reported from Asia. Also included in the assemblage is a silicified porate permosphinctan, Amblysiphonella cf. barroisi Steinmann, 1882, which is the first report of that genus from northwestern China. Species of Stioderma are described from nearly complete specimens for the first time. Previously described species have been based on isolated spicules or relatively small fragments.


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