Where: Anhui, China (31.6° N, 117.8° E: paleocoordinates 20.1° N, 99.8° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Biandanshan Formation, Spathian (251.3 - 247.2 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: basinal (); lithified claystone

Size class: macrofossils

Preservation: mold/impression

Reposited in the NIGPAS

Primary reference: P. X. Guo. 1982. On the occurrence of late Lower Triassic ammonoids from Anhui and Jiangsu. Acta Palaeontologica Sinica 21:560-567 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 150821: authorized by Matthew Clapham, entered by Matthew Clapham on 15.09.2013

Creative Commons license: CC BY (attribution)