Where: Guizhou, China (25.7° N, 105.2° E: paleocoordinates 11.2° S, 95.1° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Yangchang Formation, Artinskian (290.1 - 279.3 Ma)

• Ammonoids, which are close to forms from the lower Longyin Formation of the Longyin section, also have an early Artinskian age:

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified claystone

Size class: macrofossils

Reposited in the NIGPAS

Primary reference: Z. R. Zhou. 2017. Permian basinal ammonoid sequence in Nanpanjiang area of South China - possible overlap between basinal Guadalupian and platform-based Lopingian. Journal of Paleontology 91(Memoir 74):1-95 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 185544: authorized by Matthew Clapham, entered by Matthew Clapham on 27.04.2017

Creative Commons license: CC BY (attribution)