Figure 5 from: Yang X, Liu W, Ahrens D, Bai M (2011) A key to species of the genus Gastroserica Brenske of the China (Coleoptera, Scarabaeidae, Sericini), with the description of two new species and two new records for China. ZooKeys 139: 23-44. https://doi.org/10.3897/zookeys.139.1702 - Liu, Wangang (2011)