Opisthotropis zhaoermii is a natricid snake species originally described from western Hunan Province, China and subsequently recorded in eastern Guizhou Province. In July 2011, an adult female snake specimen (YBU 11260; total length 363 mm, snout-vent length 287 mm, tail length 76 mm) was collected from Xiushan, Chongqing, China (108°55′44″ E, 28°16′29″ N, 588 m a.s.l.). Morphological examination revealed diagnostic characteristics consistent with O. zhaoermii, including a dark olive-green dorsal surface with yellowish-white longitudinal stripes, an ivory-yellow ventral surface with asymmetrical speckles laterally; subcaudals edged with dark pigmentation forming continuous longitudinal stripes, 142 ventral scales, and 28 maxillary teeth on both sides (Fig. 1). Molecular phylogenetic analysis based on mitochondrial cytochrome b (Cyt b) gene sequences demonstrated minimal genetic divergence (p-distance ≤ 0.01%, Bayesian posterior probability 0.96), further confirming it as O. zhaoermii (Fig. 2). This specimen represents the first confirmed record of O. zhaoermii in Chongqing, significantly extending its known distributional range westward beyond previously recorded localities in Hunan and Guizhou provinces. This discovery provides critical baseline data for resolving taxonomic and biogeographical questions concerning the O. latouchii species complex.