List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
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Mamenchisaurus hochuanensis
Chao 1965
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1 individual | |||||||||
Mamenchisaurus jingyanensis
Zhang et al. 1998
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Zhang et al. 1998 | 1 specimen | ||||||||
CV00219, " Two isolated teeth, a column of medial and posterior cervicals with articulated ribs, four fused sacrals, several medial and posterior caudals, a complete right scapulacoracoid, two complete humeri, one distal femur, and semi-complete tibia and fibula" | ||||||||||
see common names |
Geography
Country: | China | State/province: | Sichuan | County: | Rongxian |
Coordinates: | 29.5° North, 104.4° East (view map) | ||||
Paleocoordinates: | 29.4° North, 109.1° East | ||||
Basis of coordinate: | based on nearby landmark | ||||
Altitude: | 595 meters | ||||
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: | not reported |
Environment: | terrestrial indet. |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils |
Fragmentation: | occasional |
Temporal resolution: | snapshot |
Collection methods and comments
Collection methods: | selective quarrying,mechanical,field collection | ||
Reason for describing collection: | taxonomic analysis | ||
Collectors: | Zhang & Zheng | Collection dates: | 1977 |
Collection method comments: discovered by the Second Brigade of the Regional Geological and Aerial Survey Corp. from the Sichuan Department of Geology |
Metadata
Database number: | 60064 | ||
Authorizer: | M. Carrano, A. Dunhill | Enterer: | M. Carrano, B. Allen |
Modifier: | G. Varnham | Research group: | vertebrate |
Created: | 2006-04-28 10:37:14 | Last modified: | 2022-05-06 03:45:57 |
Access level: | the public | Released: | 2006-04-28 10:37:14 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
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] |
Secondary references:
67716 | Y. Zhang, K. Li, and Q. Zeng. 1998. A new species of sauropod from the Late Jurassic of the Sichuan Basin (Mamenchisaurus jingyanensis sp. nov.). Journal of the Chengdu University of Technology 25(1):61-68 [A. Dunhill/B. Allen] |