Where: Sichuan, China (32.4° N, 106.9° E: paleocoordinates 32.8° N, 110.6° E)
• coordinate stated in text
• small collection-level geographic resolution
When: Upper Member (Shaximiao Formation), Bathonian to Bathonian (168.3 - 163.5 Ma)
• "upper Shaximiao Formation"
•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: terrestrial; lenticular breccia and brown, red, yellow mudstone
Size classes: macrofossils, mesofossils
Collected by Chingking NHM in 1978; reposited in the IVPP
Collection methods: quarrying, mechanical,
Primary reference: M. Chow and T. H. V. Rich. 1982. Shuotherium dongi, n. gen. and sp., a therian with pseudo-tribosphenic molars from the Jurassic of Sichuan, China. Australian Mammalogy 54:127-142 [M. Carrano/M. Carrano/M. Carrano]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 47134: authorized by Matthew Carrano, entered by Matthew Carrano on 15.02.2005, edited by Jonathan Tennant
Creative Commons license: CC BY (attribution)
Taxonomic list
Reptilia | |
Mamenchisaurus sp. Young 1954 mamenchisaurid | |
Mammalia | |
Shuotherium shilongi n. sp., Shuotherium dongi n. gen. n. sp.
Shuotherium shilongi n. sp. Wang et al. 1998 mammal An isolated right upper molar, probably not the most distal (IVPP catalog no. V7467)
Shuotherium dongi n. gen. n. sp. Chow and Rich 1982 mammal |