Ma Shun, Shi Sheng-Chao, Qian Tian-Yu, Sui Lu-Lu, Wang Bin, Jiang Jian-Ping
Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China.
College of Life Science, University of Chinese Academy of Sciences, Beijing 100049, China.
Animals (Basel). 2024 Aug 17;14(16):2384. doi: 10.3390/ani14162384.
A new species, , from the dry-hot valleys near the Yarlung Zangbo River in Re Village, Jindong Countryside, Lang County, Linzhi City, Xizang Autonomous Region, China, is described herein based upon the integrative taxonomic results combining molecular phylogenetic systematics and morphological characteristic comparisons. Our molecular phylogeny was inferred by combining three mitochondrial gene fragments (//), and it indicated a distinct differentiation between the new species and species complex, with obvious genetic distances ( 9.9-11.8%/ 16.5-18.2%/ 16.6-18.5%) detected, supporting its validity. Morphologically, the new species can be easily distinguished from its congers by the following characters: (1) medium size (SVL 48.58-50.92 mm), (2) tubercles on dorsum sparse, (3) tail segments absent and tubercles on tails absent, (4) supralabials 10-12 and infralabials 8-10, (5) interorbital scales between anterior corners of the eyes 28-32, (6) scale rows at midbody 96-98, (7) ventral scales between mental and cloacal slit 145-153, (8) ventral scale rows 41-45, and (9) 4 to 5 white-yellow transverse bands with brown dots and black merges between the nape and sacrum. The description of increased the total species number of group to three, and the total species number in Xizang to six and in China to eleven. The new species is currently only known from the type locality with its extremely small populations and needs future surveys to reveal its distribution range, population status, natural history, and mechanisms so that the new species can coexist with .
中国西藏自治区林芝市朗县金东乡热村雅鲁藏布江附近干热河谷发现了一个新物种,本文基于分子系统发育学和形态特征比较相结合的综合分类学结果对其进行了描述。我们通过合并三个线粒体基因片段(//)推断分子系统发育,结果表明新物种与物种复合体之间存在明显分化,检测到明显的遗传距离(9.9 - 11.8% / 16.5 - 18.2% / 16.6 - 18.5%),支持其有效性。在形态上,新物种可通过以下特征与同属物种轻松区分:(1)中等体型(体长48.58 - 50.92毫米),(2)背部瘤稀疏,(3)尾部无节段且无瘤,(4)上唇鳞10 - 12枚,下唇鳞8 - 10枚,(5)两眼间前角间眶间鳞28 - 32枚,(6)体中部鳞片行96 - 98行,(7)颏部至泄殖腔裂口腹侧鳞片145 - 153枚,(8)腹侧鳞片行41 - 45行,(9)颈背至骶部有4至5条带褐色斑点和黑色融合的白黄色横带。该新物种的描述使该属物种总数增至三个,西藏的该属物种总数增至六个,中国的该属物种总数增至十一个。目前仅在模式产地发现该新物种,其种群数量极少,需要未来进行调查以揭示其分布范围、种群状况、自然史及生存机制,以便该新物种能与同属物种共存。