Also known as Chen Chia, Chenxi

Where: Sichuan, China (29.5° N, 104.4° E: paleocoordinates 30.1° N, 109.4° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Lower Member (Shaximiao Formation), Bajocian (170.3 - 168.3 Ma)

• below Tzeliuching limestone, and therefore below Omeisaurus junghsiensis type site

•

•Wang et al. 2018 suggested an Oxfordian age for the lower beds, rather than Middle Jurassic

•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

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

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: general faunal/floral analysis

PaleoDB collection 47072: authorized by Matthew Carrano, entered by Matthew Carrano on 07.02.2005, edited by Evangelos Vlachos

Creative Commons license: CC BY (attribution)