Maoershi, Jiangbei (Jurassic to of China)

Also known as Mai-eisni

Where: Sichuan, China (27.8° N, 105.3° E: paleocoordinates 28.0° N, 110.5° 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: terrestrial; lithology not reported

Size class: macrofossils

Collected in 1977

Collection methods: quarrying, mechanical,

Primary reference: Z. Dong, S. Zhou, and H. Zhang. 1983. [Dinosaurs from the Jurassic of Sichuan]. Palaeontologica Sinica, New Series C, Whole Number 162(23):1-136 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 60067: authorized by Matthew Carrano, entered by Matthew Carrano on 28.04.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Ornithischia - Stegosauridae
Chungkingosaurus jiangbeiensis n. gen. n. sp. Dong et al. 1983 ornithischian
CV 00206