Xituyao village (Geological Museum of China collection) (Cretaceous of China)

Where: Hebei, China (41.4° N, 116.3° E: paleocoordinates 43.6° N, 117.7° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: 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.

Environment/lithology: lacustrine - large; lithified siliciclastic sediments

Size class: macrofossils

Preservation: mold/impression

Collection methods: Repository: National Geological Museum of China

Primary reference: B. Wang, H. Zhang, Y. Fang, D. Wang, and S. Ji. 2008. New data on Cretaceous Palaeontinidae (Insecta: Hemiptera) from China. Cretaceous Research 29:551-560 [M. Clapham/J. Karr]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 106354: authorized by Matthew Clapham, entered by Jered Karr on 11.03.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

 Hemiptera - Palaeontinidae
"Liaocossus fengningensis n. sp." = Ilerdocossus fengningensis
"Liaocossus fengningensis n. sp." = Ilerdocossus fengningensis Ren et al. 1998 true bug