Also known as Chongqing, Xinjiangchelys radiplicatus type

Where: Sichuan, China (29.6° N, 106.6° E: paleocoordinates 30.0° N, 111.2° E)

• coordinate based on political unit

• small collection-level geographic resolution

When: Upper Member (Shaximiao Formation), Bathonian to Bathonian (168.3 - 163.5 Ma)

• 'Upper Xiaximiao 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; lithology not reported

Size class: macrofossils

Primary reference: A. T. Matzke, M. W. Maisch, G. Sun, H. Pfretzschner, and H. Stöhr. 2004. A new xinjiangchelyid turtle (Testudines, Eucryptodira) from the Jurassic Qigu Formation of the southern Junggar Basin, Xinjiang, North-West China. Palaeontology 47(5):1267-1299 [R. Benson/R. Benson/P. Mannion]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 137598: authorized by Roger Benson, entered by Roger Benson on 18.12.2012

Creative Commons license: CC BY (attribution)