Where: Yunnan, China (24.7° N, 102.6° E)

• Paleocoordinates: 22.3° N, 60.7° E (Wright 2013)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Zhongyicun Member (Yuhucun Formation), Nemakit-Daldynian (538.8 - 525.5 Ma)

• Assigned to the Zhongyicun Member of the Meishucun Formation by Wang et al. (1983). M.Y. Zhu et al. (2001) argued for assigning this member to the Zhujiaqing Formation instead, although other papers assigned it to the Yuhucun Formation (R.X. Zhu et al., 2009, Tang et al., 2021). This interval is above the first appearance of small shelly fossils (shown by Wang et al. 1983) but below a volcanic ash dated by U-Pb SHRIMP at 535.2 +/- 1.7 Ma (R.X. Zhu et al., 2009), indicating an earliest Cambrian (Fortunian) age.

• bed-level stratigraphic resolution

Environment/lithology: lithified, cherty/siliceous phosphorite

Size class: microfossils

Preservation: permineralized, original carbon, replaced with silica

Collection methods: peel or thin section

Primary reference: F. X. Wang, X. Y. Zhang, and R. H. Guo. 1983. The Sinian microfossils from Jinning, Yunnan, south west China. Precambrian Research 23:133-175 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 227763: authorized by Matthew Clapham, entered by Matthew Clapham on 29.10.2022

Creative Commons license: CC0 (CC0)