2013, 32(3) 437-446 DOI:     ISSN: 1004-5589 CN: 22-1111/P

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Keywords
Xinjiang
Shanshan
Xinjiangtitan shanshanesis
Middle Jurassic
Qigu Formation
Mamenchisauridae
Sauropoda
Authors
WU Wen-Hao-1
2
ZHOU Chang-Fu-3
Oliver Wings4
5
GUAN Gu-Tou-6
DONG Zhi-Ming-2
3
7
PubMed
Article by Wu, W. H. 1
Article by 2
Article by Zhou, C. F. 3
Article by Oliver Wings4
Article by 5
Article by Guan, G. T. 6
Article by Dong, Z. M. 2
Article by 3
Article by 7

A new gigantic sauropod dinosaur from the Middle Jurassic of Shanshan,Xinjiang

WU Wen-Hao-1, 2, ZHOU Chang-Fu-3, Oliver Wings4, 5, GUAN Gu-Tou-6, DONG Zhi-Ming-2, 3, 7

1. Research Center of Paleontology & Stratigraphy,Jilin University,Changchun 130026,China; 2. Key-Lab for Evolution of Past Life & Envirenment,MOEC ( Jilin University) ,Changchun 130026,China; 3. College of Paleontology,Shenyang Normal University,Shenyang 110034,China; 4. Lower Saxon State Museum,Hannover 30169,Germany; 5. Natural History Museum of Berlin,Berlin 10115,Germany; 6. Fukui Prefectural Dinosaur Museum,Fukui 911-8601,Japan; 7. Institute of Vertebrate Paleontology & Paleoanthropology,CAS,Beijing 100044,China.

Abstract

A new gigantic sauropod dinosaur,Xinjiangtitan shanshanesis gen. et sp. nov. is reported with preliminary descriptions. It is well preserved in situ and discovered from the Middle Jurassic Qigu Formtion in Shanshan of Xinjiang for the first time. Xinjiangtitan ( gen. nov. ) is characterized by a ventral keel developed on the penultimated cervical centrum and formed a small semi-circular process under the distal articular facet,last two cervical vertebrae are particularly elongated ( ratio“length of the last two cervical vertebrae / length of femur and tibia”is 0. 63) ,sacricostal yoke excepting the first sacral rib,and extremely robust femur ( ratio“transverse width of the distal end / femur length”is 0. 33) . Cladistic analysis places Xinjiangtitan as the sister group of Mamenchisaurus. Xinjiangtitan is definitely a new taxon of mamenchisaurid dinosaur. However,Xinjiangtitan developed several diplodocid-like characters: prominent ambiens process of pubis,relatively short hind limb and caudomedially developed fourth trochanter on femoral body. The total body length of Xinjiangtitan is calculated as 30-32 meters.

Keywords Xinjiang   Shanshan   Xinjiangtitan shanshanesis   Middle Jurassic   Qigu Formation   Mamenchisauridae   Sauropoda  
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