A neornithischian dinosaur from the Middle Jurassic Xintiangou Formation of Yunyang, Chongqing, China: the earliest record in Asia

被引：21
|
作者：
Li, Ning [1 ]
Dai, Hui [1 ]
Tan, Chao [1 ]
Hu, Xufeng [1 ]
Wei, Zhaoying [1 ]
Lin, Yu [1 ]
Wei, Guangbiao [2 ]
Li, Deliang [2 ]
Meng, Li [3 ]
Hao, Baoqiao [4 ]
You, Hailu [5 ,6 ,7 ]
Peng, Guangzhao [4 ]
机构：
[1] Chongqing Bur Geol & Mineral Resource Explorat &, Chongqing Lab Geoheritage Protect & Res, Hydrogeol & Engn Geol Team 208, Chongqing, Peoples R China
[2] Chongqing Inst Geol Survey, Chongqing, Peoples R China
[3] Chongqing Inst Geol & Mineral Resources, Chongqing Key Lab Exogen Mineralizat & Mine Envir, Chongqing, Peoples R China
[4] Zigong Dinosaur Museum, Zigong, Sichuan, Peoples R China
[5] Chinese Acad Sci, Key Lab Vertebrate Evolut & Human Origins, Inst Vertebrate Paleontol & Paleoanthropol, Beijing, Peoples R China
[6] CAS Ctr Excellence Life & Paleoenvironm, Beijing, Peoples R China
[7] Univ Chinese Acad Sci, Beijing, Peoples R China
来源：
HISTORICAL BIOLOGY | 2021年 / 33卷 / 07期
关键词：
Neornithischian; Xintiangou Formation; Middle Jurassic; Yunyang; Chongqing; BODIED ORNITHISCHIAN DINOSAURS; PHYLOGENETIC POSITION; ANATOMY; PARVUS;
D O I：
10.1080/08912963.2019.1679129
中图分类号：
Q [生物科学];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
A new neornithischian dinosaur, Sanxiasaurus modaoxiensis gen. et sp. nov., is described based on a partial postcranial skeleton from the Middle Jurassic Xintiangou Formation of Yunyang, Chongqing Municipality, China. It is the first neornithischian dinosaur from the Middle Jurassic Xintiangou Formation of Sichuan Basin, and also the earliest record of a neornithischian dinosaur in Asia. It differs from other neornithischians in possessing the following unique combination of characters: at least four sacrals; humerus strongly bowed laterally along its length; obturator process located at mid-length of ischial shaft; lesser trochanter of femur broadened, wing shaped and subequal in anteroposterior width to greater trochanter; distal tibia with elongate posterolateral process. Phylogenetic analysis shows that Sanxiasaurus modaoxiensis is positioned near the base of neornithischia. This find extends the Asia neornithischian stratigraphic horizon to the lower Middle Jurassic.
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收藏
页码：1089 / 1102
页数：14
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