Also known as Ho Chuan, Hechuan, Taihe
Where: Sichuan, China (30.1° N, 103.8° E: paleocoordinates 29.8° N, 108.4° E)
• coordinate based on nearby landmark
• small collection-level geographic resolution
When: Upper Member (Shaximiao Formation), Bathonian to Bathonian (168.3 - 163.5 Ma)
• 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).
• bed-level stratigraphic resolution
Environment/lithology: fluvial; red siliciclastic sediments
Size class: macrofossils
Collected in 1957; reposited in the IVPP
Collection methods: quarrying, mechanical,
• discovered by Petroelum Geology Dept. of Sichuan province
Primary reference: S. Chao. 1965. Wǒguó de dà kǒnglóng yī héchuān mǎmén xī lóng [China’s largest dinosaur—Hehchuan-Mamenxian dragon]. Sheng wu xue tong bao [Bulletin of Biology] 1965(4):35-37 [M. Carrano/M. Carrano]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 53662: authorized by Matthew Carrano, entered by Matthew Carrano on 13.09.2005
Creative Commons license: CC BY (attribution)
Taxonomic list
Reptilia | |
Mamenchisaurus hochuanensis n. sp.
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