Figure 6 from: Staab M, Hita Garcia F, Liu C, Xu Z-H, Economo EP (2018) Systematics of the ant genus Proceratium Roger (Hymenoptera, Formicidae, Proceratiinae) in China – with descriptions of three new species based on micro-CT enhanced next-generation-morphology. ZooKeys 770: 137-192. https://doi.org/10.3897/zookeys.770.24908 - Staab, Michael (2018)