Also known as Xiguashan, Dongmenwai, Rongxian

Where: Sichuan, China (29.5° N, 104.4° E: paleocoordinates 29.4° N, 109.1° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

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

• 200 m above Tzeluting (Tzeliuching) Fm.

•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-lacustrine; gray, green sandstone

Size class: macrofossils

Collected by C. L. Camp & C.-C. Young in 1936-1974; reposited in the IVPP

Collection methods: quarrying, mechanical,

Primary reference: C.-C. Young. 1937. New Triassic and Cretaceous reptiles in China. Bulletin of the Geological Society of China 17(1):109-120 [M. Carrano/K. Maguire/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 47071: authorized by Matthew Carrano, entered by Matthew Carrano on 07.02.2005

Creative Commons license: CC BY (attribution)