Where: Shaanxi, China (35.2° N, 109.0° E: paleocoordinates 39.5° N, 87.3° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Yanchang Formation, Longobardian (242.0 - 235.0 Ma)

• Fossils come from Upper part of Lower Member of Tongchuan. Ash beds from within the insect-bearing units dated at 238.0 and 237.4 Ma, indicating latest Ladinian age (Zheng et al., 2018). Most authors have indicated that the Tongchuan Formation should be abolished as it has no distinctive lithostratigraphic criteria by which it can be separated from the Yanchang Formation.

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine; lithified, gray, green mudstone

Size class: mesofossils

Preservation: mold/impression

Collection methods: Repository: Tianjin Institute of Geology and Mineral Resources

Primary reference: Y. C. Hong and R. Y. Chen. 1981. Magnacicadiidae, a new family of Homoptera from the Middle Triassic of Tongchuan, Shaanxi Province. Chinese Science Bulletin 26:338-340 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 123778: authorized by Matthew Clapham, entered by Jered Karr on 28.01.2012, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)