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

• coordinate based on nearby landmark

• 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.

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

Size class: mesofossils

Preservation: mold/impression

Collection methods: Repository: Beijing Museum of Natural History

Primary reference: Y. C. Hong, S. Chen, and S. T. Liu. 2002. Middle Triassic new fossils of Protorthophlebia Tillyard (Insecta: Mecoptera) from Tongchuan region, Shaanxi province, China. Entomologia Sinica 9(2):51-57 [M. Clapham/J. Karr/J. Karr]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 117138: authorized by Matthew Clapham, entered by Jered Karr on 15.09.2011, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)