List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
- Metriacanthosauridae
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Yangchuanosaurus shangyouensis n. gen., n. sp.
Dong et al. 1978
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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 |
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:
13360 | ETE | Z. Dong. 1992. Dinosaurian Faunas of China. China Ocean Press, Beijing 1-188 [M. Carrano/M. Carrano/M. Carrano] |
17258 | ETE | 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] |