Lateral (dorsolateral) view of the alpine pitvipers (Gloydius strauchi complex) that distributed in Sichuan and Tibet (not to scales); the lateral stripes are pointed by arrows A G. lateralis sp. nov., CIB 119377 (JZ02), female, from Jiuzhaigou, Sichuan B G. swild, IVPP OV 2725, female, from Heishui, Sichuan C G. angusticeps, male, from Golog, Qinghai (not included in this study) D G. liupanensis, male, from Longnan, Gansu E G. qinlingensis, male, from Ningshaan, Shaanxi F G. strauchi, from Sichuan G G. lipipengi, IVPP OV 2720, male, from Zayu, Tibet H G. rubromaculatus, male from Yushu, Qinghai I G. huangi, CIB 533422012, male, from Hola, Mangkang. Copyright: Sheng-Chao Shi (A, I), Jing-Song Shi (B, E, G, H), Hong Zhao (C), Zu-Yao Xia (D) and Zhi-Yuan Tang (F).