Shangyou Reservoir: Bathonian - Callovian, China
collected by Yang & Cheng 1976-1977

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia - Metriacanthosauridae
Yangchuanosaurus shangyouensis n. gen., n. sp. Dong et al. 1978
1 individual
(4 measurements)
see common names

Geography
Country:China State/province:Sichuan County:Yongchuan
Coordinates: 29.3° North, 105.7° East (view map)
Paleocoordinates:29.6° North, 110.4° East
Basis of coordinate:stated in text
Geographic resolution:small collection
Time
Period:Jurassic Epoch:Middle Jurassic
Key time interval:Bathonian - Callovian
Age range of interval:168.30000 - 163.50000 m.y. ago
Stratigraphy
Geological group:Chongqing Formation:Shaximiao Member:Upper
Stratigraphic resolution:bed
Stratigraphy comments: Several radiometric ages have been reported for the Shaximiao Formation, including 167 Ma or 172 Ma (Zong and Shi, 1997), 167–172 Ma or 178–169 Ma (Gou et al., 2000), 163±3 Ma (Li et al., 2010), 160±4 Ma (Luo et al., 2014), 158±7 Ma (Qian et al., 2016), and 159±2 Ma (Wang et al., 2018). However, more recent studies suggest an older age; Dai et al. 2022 reported a maximum depositional age for the bone-bearing layers of the lower member of the Shaximiao formation to be Bjaocan. Zhou et al. 2022 also supported a late Middle Jurassic age for the Shaximiao Formation (Bathonian-Callovian).
Lithology and environment
Primary lithology:red sandy mudstone
Includes fossils?Y
Lithology description: "dark-red sandy mudstones"
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Degree of concentration:dispersed
Size of fossils:macrofossils
Spatial orientation:life position
Preservation of anatomical detail:good
Articulated whole bodies:all
Fragmentation:occasional
Temporal resolution:snapshot
Collection methods and comments
Collection methods:salvage,selective quarrying,mechanical,field collection
Reason for describing collection:taxonomic analysis
Collectors:Yang & Cheng Collection dates:1976-1977
Metadata
Also known as:Yangchuanosaurus type site
Database number:49790
Authorizer:M. Carrano Enterer:M. Carrano
Modifier:G. Varnham Research group:vertebrate
Created:2005-04-26 06:21:30 Last modified:2022-05-06 03:39:57
Access level:the public Released:2005-04-26 06:21:30
Creative Commons license:CC BY
Reference information

Primary reference:

29352.ETE Z. Dong, Y. Zhang, X. Li and S. Zhou. 1978. [A new carnosaur from Yongchuan County, Sichuan Province]. Ke Xue Tong Bao [Science Newsletter] 23(5):302-304 [M. Carrano/M. Carrano]

Secondary references:

13360ETE Z. Dong. 1992. Dinosaurian Faunas of China. China Ocean Press, Beijing 1-188 [M. Carrano/M. Carrano/M. Carrano]
17258ETE Z. Dong, S. Zhou, and H. Zhang. 1983. [Dinosaurs from the Jurassic of Sichuan]. Palaeontologica Sinica, New Series C, Whole Number 162(23):1-136 [M. Carrano/M. Carrano]