Ma Shun, Xu Yu-Hao, Qi Shuo, Wang Ying-Yong, Tang Shan-Shan, Huang Song, Jiang Jian-Ping
Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China Chengdu Institute of Biology, Chinese Academy of Sciences Chengdu China.
University of Chinese Academy of Science, Beijing 100049, China University of Chinese Academy of Science Beijing China.
Zookeys. 2023 Sep 28;1181:9-27. doi: 10.3897/zookeys.1181.109462. eCollection 2023.
A new species, , from central Hunan Province is described, based on the results of molecular systematics and morphological characters according to five specimens. Our molecular phylogeny inferred from the mitochondrial gene fragment revealed that this new species is most closely related to , but a considerable amount of genetic divergence exists between them (-distance ranging from 5.8% to 6.4%) and much distinct genetic divergence exists compared with other known species (-distance ranging from 10.4% to 15.8%), supporting its validity. Morphologically, it can be distinguished from its congeners by: (1) dorsal scales strongly keeled, 23 rows throughout the body, the outmost row smooth and significantly enlarged; (2) tail relatively short, TaL/TL 0.183 ~ 0.224; (3) the suture between internasals subequal to the suture between prefrontals; (4) loreal one, subrectangular, LorH/LorL 0.53 ~ 0.57; (5) ventrals 161-170, anal entire, subcaudals 55-61, not paired; (6) the length of supraocular equal to or longer than the length of upper anterior temporal; and (7) vertebral line inconspicuous and subcaudal streak absent. Currently, 27 species of are known in the world, amongst which 20 species are distributed in China. Moreover, a key to species of the genus is provided in this study.
基于五个标本的分子系统学和形态特征结果，描述了一种来自中国湖南省中部的新物种。我们从线粒体基因片段推断的分子系统发育表明，这个新物种与[某物种]关系最为密切，但它们之间存在相当大的遗传差异（-距离范围为5.8%至6.4%），与其他已知的[某属物种]相比，存在明显不同的遗传差异（-距离范围为10.4%至15.8%），支持了它的有效性。在形态上，它可以通过以下特征与同属物种区分开来：（1）背鳞强烈具棱，全身23行，最外一行光滑且显著增大；（2）尾巴相对较短，尾长/体长为0.183至0.224；（3）鼻间缝与额前缝近等长；（4）眶下鳞一枚，近长方形，眶下鳞高/眶下鳞长为0.53至0.57；（5）腹鳞161 - 170枚，肛鳞完整，尾下鳞55 - 61枚，不成对；（6）眶上鳞长度等于或长于上前颞鳞长度；（7）椎线不明显且无尾下纹。目前，世界上已知[某属]有27个物种，其中20个物种分布在中国。此外，本研究还提供了该属物种的检索表。
