Where: Sichuan, China (29.6° N, 103.4° E: paleocoordinates 35.8° N, 93.5° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Xiaotangzi Formation, Alaunian (215.6 - 212.0 Ma)

• Middle Norian

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified lithology not reported

Size class: macrofossils

Primary reference: C. Xu. 1978. Lamellibranchiata. Palaeontological Atlas of Southwest China - Sichuan Volume 2:315-364 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 123714: authorized by Matthew Clapham, entered by Matthew Clapham on 27.01.2012

Creative Commons license: CC BY (attribution)