Achalinus (common name: odd-scaled snakes[2]) is a genus of harmless snakes in the family Xenodermidae. They are found in Japan, Taiwan, China, and northern Vietnam. Ten species are currently recognized.[1][3] Achalinus was previously placed in Colubridae (along with other xenodermids).[4] Nicknamed ‘odd-scaled’ due to the fact their scales do not overlap one another like most snakes, but instead are spread out and lie individually.
A. formosanus Boulenger 1908 1 Formosa odd-scaled snake Taiwan and Japan in the southern Ryukyu islands A. hainanus Huang 1975 0 Hainan odd-scaled snake China on Hainan island A. huangjietangi R. Huang, Peng, & S. Huang, 2021 0 Huang's odd-scaled snake Huangshan City, Anhui Province, China A. jinggangensis (Zong & Ma 1983) 0 Zong's odd-scaled snake China in Jiangxi A. juliani Ziegler, Nguyen, Pham, Nguyen, Pham, Van Schingen, Nguyen, & Le, 2019 0 Julian's burrowing snake Vietnam A. meiguensis Hu & Zhao 1966 0 Szechwan odd-scaled snake China in western Sichuan at elevations of 1200–1400 m A. niger Maki 1931 0 Black odd-scaled snake Taiwan A. panzhihuaensis Hou, Wang, Guo, Chen, Yuan, & Che, 2021 0 Panzhihua odd-scaled snake China A. pingbianensis Li, Yu, Wu, Liao, Tang, Liu, & Guo 2020 0 Pingbian odd-scaled snake China A. rufescens Boulenger 1888 0 Boulenger's odd-scaled snake Northern Vietnam and China in Hong Kong, Hainan and west to Guizhou, Shaanxi, Guangdong and Fujian 
A. spinalis Peters 1869 0 Peters' odd-scaled snake Northern Vietnam, Japan (Kyūshū, Honshū, the Ryukyu Islands, Koshiki, Tokuno-shima: Kametoku and Inokawa), and central China (east to Fujian, west to Yunnan and Sichuan, and north to Gansu and Shaanxi. Also in Zhejiang, Jiangxi, Jiangsu and Hubei) at an elevation of 1,230 m A. timi Ziegler, Nguyen, Pham, Nguyen, Pham, Van Schingen, Nguyen, & Le, 2019 0 Tim's burrowing snake Vietnam A. tranganensis[5] Luu, Ziegler, Ha, Lo, Hoang, Ngo, Le, Tran & Nguyen, 2020 0 Vietnam: Ninh Binh province A. werneri Van Denburgh 1912 0 Amami odd-scaled snake Japan in the central Ryukyu islands A. yangdatongi Hou, Wang, Guo, Chen, Yuan, & Che, 2021 0 Yang's odd-scaled snake China A. yunkaiensis Wang, Li & Wang, 2019 0 Yunkai Mountain's odd-scaled snake, Yunkai Mountain's burrowing snake China A. zugorum Miller, Davis, Luong, and Do, 2020 0 Zug's odd-scaled snake [6] Northern Vietnam *) Not including the nominate subspecies.
Achalinus (common name: odd-scaled snakes) is a genus of harmless snakes in the family Xenodermidae. They are found in Japan, Taiwan, China, and northern Vietnam. Ten species are currently recognized. Achalinus was previously placed in Colubridae (along with other xenodermids). Nicknamed ‘odd-scaled’ due to the fact their scales do not overlap one another like most snakes, but instead are spread out and lie individually.
