Nugraha Fitra Arya Dwi, Ahda Yuni, Tjong Djong Hon, Kurniawan Nia, Riyanto Awal, Fauzi Muhammad Alif, Lin Si-Min
Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Padang, Jl. Hamka, Kota Padang 25132, Sumatra Barat, Indonesia Universitas Negeri Padang Padang Indonesia.
Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Andalas, Limau Manis, Pauh, Kota Padang 25175, Sumatra Barat, Indonesia Universitas Andalas Padang Indonesia.
Zookeys. 2023 Jul 6;1169:47-64. doi: 10.3897/zookeys.1169.98681. eCollection 2023.
The lowland region of Sumatra Barat has received little attention in previous biodiversity studies. Past studies have mainly focused on highland habitat and conservation areas. However, many populations of in the lowland habitats of Sumatra Barat were not correctly identified. A phylogenetic tree based on the NADH dehydrogenase subunit 2 (ND2) gene showed that the lowland Sumatran population is the sister group of the Malaysian lowland species, , together nesting within the group. The genetic divergence within the Sumatra Barat population is 0-4.2% and 18.3-20% to . Further examination of morphological characters revealed that they differed from the sister clade and other Sumatran members by a unique combination of characters such as absence of tubercle on brachium, presence of tubercle on ventrolateral fold, 32-41 paravertebral tubercles, 38-46 ventral scales, enlarged femoral scales, presence of precloacofemoral pores and 22-23 subdigital lamellae under fourth toe. Based on the morphological and molecular evidence, the lowland Sumatran population is herein described as a new species, increasing the number of species in Sumatra to seven. More comprehensive and intensive sampling efforts would most likely yield further discoveries in the group of Sumatran in the near future.
苏门答腊岛西部低地地区在以往的生物多样性研究中很少受到关注。过去的研究主要集中在高地栖息地和保护区。然而，苏门答腊岛西部低地栖息地的许多种群没有得到正确识别。基于烟酰胺腺嘌呤二核苷酸脱氢酶亚基2（ND2）基因构建的系统发育树表明，苏门答腊岛低地种群是马来西亚低地物种的姐妹群，共同嵌套在该类群中。苏门答腊岛西部种群内部的遗传差异为0-4.2%，与其他种群的差异为18.3-20%。对形态特征的进一步研究表明，它们与姐妹分支和其他苏门答腊岛成员不同，具有独特的特征组合，如肱部无瘤、腹侧褶有瘤、32-41个椎旁瘤、38-46个腹侧鳞片、股鳞增大、泄殖腔前股孔存在以及第四趾下有22-23个亚趾片。基于形态和分子证据，苏门答腊岛低地种群在此被描述为一个新物种，使苏门答腊岛的物种数量增加到七个。在不久的将来，更全面和深入的采样工作很可能会在苏门答腊岛该类群中发现更多物种。
