Yang Dian-Cheng, Huang Ru-Yi, Jiang K E, Burbrink Frank T, Gong Yan-An, Yu Jing, Zhang Y I, Huang Tian-Qi, Huang Song
Anhui Province Key Laboratory of the Conservation and Exploitation of Biological Resource, College of Life Sciences, Anhui Normal University, Wuhu 241000, China. 2 Huangshan Noah Biodiversity Institute, Huangshan 245000, China..
Anhui Province Key Laboratory of the Conservation and Exploitation of Biological Resource, College of Life Sciences, Anhui Normal University, Wuhu 241000, China. 2 Huangshan Noah Biodiversity Institute, Huangshan 245000, China. Shanghai Collaborative Innovation for Aquatic Animal Genetics and Breeding, Shanghai Ocean University, Shanghai 201306, China..
Zootaxa. 2022 Sep 27;5190(1):127-140. doi: 10.11646/zootaxa.5190.1.5.
A new species of odd-scaled snake in the genus Achalinus is described from Ningshan County, Shaanxi Province, China, based on seven female specimens. Morphologically, the new species can be distinguished from its congeners by the following combination of characters: (1) dorsum iridescent and uniformly dark brown in preservative, longitudinal vertebral line absent; (2) light brown beneath; (3) dotted black streak in the middle of the subcaudals absent; (4) tail length relatively short, TaL/ToL 12-16%, in females; (5) fewer subcaudals, 41-46 in females; (6) dorsal scales 23 rows throughout, strongly keeled; the outer-most rows on both sides are also keeled and slightly enlarged; (7) one loreal; (8) internasal not fused to prefrontal; (9) suture between internasals is similar in size when compared to the suture between prefrontals; (10) preocular and postocular absent; (11) 6 supralabials; (12) 5 infralabials, the first 3 (rarely 2) touching the first pair of chin shields; (13) 3 pairs of chin shields. A phylogenetic analysis using mitochondrial gene, cytochrome c oxidase subunit 1 (CO1), showed that this new species forms a monophyletic group with strong support. In addition, the uncorrected p-distances between the new species and other known congeners ranged from 3.4% to 13.0%. The recognition of the new species increases the number of described Achalinus species to 21.
基于7个雌性标本，在中国陕西省宁陕县描述了脊蛇属的一种新的奇鳞蛇。在形态上，新物种可通过以下特征组合与同属其他物种区分开来：(1) 保存状态下背部呈虹彩且均匀深褐色，无纵向脊椎线；(2) 腹面浅褐色；(3) 尾下鳞中间无点状黑色条纹；(4) 尾长相对较短，雌性的尾长/全长为12 - 16%；(5) 尾下鳞较少，雌性为41 - 46枚；(6) 背鳞通身23行，强烈起棱；两侧最外侧一行也起棱且略增大；(7) 有1枚鼻间鳞；(8) 鼻间鳞不与前额鳞愈合；(9) 鼻间鳞之间的缝线与前额鳞之间的缝线相比大小相似；(10) 无前眼鳞和后眼鳞；(11) 有6枚上唇鳞；(12) 有5枚下唇鳞，前3枚（很少2枚）与第一对颔片相接；(13) 有3对颔片。使用线粒体基因细胞色素c氧化酶亚基1（CO1）进行的系统发育分析表明，该新物种形成一个得到有力支持的单系类群。此外，新物种与其他已知同属物种之间的未校正p距离在3.4%至13.0%之间。新物种的确认使已描述的脊蛇属物种数量增加到21种。
