Where: Yunnan, China (27.0° N, 100.2° E: paleocoordinates 19.5° S, 82.1° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Longtan Formation, Wuchiapingian (259.0 - 254.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; lithified siliciclastic sediments

Size class: macrofossils

Primary reference: X. L. Liang. 1983. New material of Permian ammonoids with discussion on the origin, migration of Araxoceratidae and the horizon of the Paratirolites. Acta Palaeontologica Sinica 22(6):606-615 [M. Clapham/M. Clapham] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 100183: authorized by Matthew Clapham, entered by Matthew Clapham on 01.12.2010

Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)