File:Xu & Zhou 2004-8 Strumigenys yangi hal.jpg

Xu, Zheng-Hui; Zhou, Xing-Guo 2004. Systematic study on the ant genus Pyramica Roger (Hymenoptera, Formicidae) of China. Acta Zootaxon. Sin. 29(3): 440-450 (page 447, worker described)