Where: Gansu, China (39.9° N, 96.8° E: paleocoordinates 39.5° N, 98.5° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Chijinpu Formation, Early/Lower Aptian (121.4 - 122.5 Ma)

• The combined biostratigraphic and numerical age data suggest that the Changma Basin began accumulating sediment no older than Hauterivian (based on pollen records), is older than the Coniacian (based on the crosscutting dykes), but is likely Barremian to Aptian based on the similarities to the Jehol biota (Suarez et al., 2013)

Environment/lithology: lacustrine; lithified, brown, yellow mudstone

Size classes: macrofossils, mesofossils

Preservation: mold/impression

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

Primary reference: Y. C. Hong. 1982. Mesozoic Fossil Insects of Jiuquan Basin in Gansu Province 1-187 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 155016: authorized by Matthew Clapham, entered by Matthew Clapham on 26.03.2014

Creative Commons license: CC BY (attribution)