Shimen village, Yangshulin, Pingquan County (GMC Beijing collection) (Cretaceous of China)

Where: Hebei, China (41.0° N, 118.9° E: paleocoordinates 43.6° N, 120.5° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Jianshangou Member (Yixian Formation), Early/Lower Aptian (125.5 - 122.5 Ma)

• U-Pb dating from the Sihetun area indicates that the Yixian Formation ranges from 124.9 ± 1.7 Ma to 122.8 ± 1.6 Ma (Yang et al., 2007). Chang et al. (2017) obtained Ar/Ar ages of 125.8 ± 1.0 Ma and 126.0 ± 0.8 Ma from the Lujiatun Unit, the lowest part of the Yixian Formation, below the lacustrine shales. They infer an age of 125.22 ± 0.22 Ma for the lower part of the Jianshangou Unit, based on their date and previously published information. It is not clear if the formation is the same age elsewhere, but for now the same age is assigned.

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine - large; lithified, tuffaceous mudstone

Size classes: macrofossils, mesofossils

Preservation: adpression

Collection methods: Repository: Geological Museum of China, Beijing

Primary reference: D. Ren. 1997. First record of fossil stick-insects from China (Phasmatodea: Hagiphasmatidae fam. nov.) with analysis of some palaeobiological features. Acta Zootaxonomica Sinica 22:268-281 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 118996: authorized by Matthew Clapham, entered by Jered Karr on 19.10.2011, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

 Hemiptera - Palaeontinidae
"Liaocossus pingquanensis n. sp." = Ilerdocossus pingquanensis
"Liaocossus pingquanensis n. sp." = Ilerdocossus pingquanensis Ren et al. 1998 true bug
 Phasmatodea - Susumaniidae
Aethephasma megista n. gen. n. sp., Orephasma eumorpha n. gen. n. sp.
Aethephasma megista n. gen. n. sp. Ren 1997 stick insect
Orephasma eumorpha n. gen. n. sp. Ren 1997 stick insect