DO Quyen Hanh, Pham Cuong The, Phan Tien Quang, LE Minh Duc, Ziegler Thomas, Nguyen Truong Quang
Faculty of Environmental Sciences, University of Science, Vietnam National University, Hanoi, 334 Nguyen Trai Road, Hanoi, Vietnam..
Zootaxa. 2020 Aug 3;4821(3):zootaxa.4821.3.5. doi: 10.11646/zootaxa.4821.3.5.
A new species of the gekkonid genus Hemiphyllodactylus is described from limestone karst forest of Tuyen Quang Province, northern Vietnam based on morphological differences and molecular divergence. Hemiphyllodactylus nahangensis sp. nov. is distinguished from the remaining congeners by having the unique combination of the following characters: a bisexual taxon; SVL of adults 41.4-43.6 mm; dorsal scale rows 18-23; ventral scale rows 9-13; chin scales bordering mental and first infralabial distinctly enlarged; 22-24 pore-bearing femoral and precloacal scales, in a continuous row, absent in females; digital lamella formula 3-4-5-4 (forefoot) and 4-5-5-5 (hindfoot); cloacal spur single, present in both sexes; dark lateral head stripe indistinct; postsacral mark cream and bearing anteriorly projecting arms. In phylogenetic analyses, the new species is placed in a clade that includes H. dushanensis, H. hongkongensis, H. huishuiensis, H. ngocsonensis and H. zugi. In terms of pairwise genetic distance, the new species is at least 5.9%-6.6% divergent from other congeners based on a fragment of the mitochondrial gene ND2.
基于形态差异和分子分歧，在越南北部宣光省的石灰岩喀斯特森林中描述了半叶趾虎属（Hemiphyllodactylus）的一个新物种。纳杭半叶趾虎（Hemiphyllodactylus nahangensis sp. nov.）与其余同属物种的区别在于具有以下独特的特征组合：两性分类群；成年个体的体长为41.4 - 43.6毫米；背鳞行数为18 - 23行；腹鳞行数为9 - 13行；与颏鳞和第一下唇鳞相邻的颏部鳞片明显增大；22 - 24枚具孔的股部和泄殖腔前鳞片，呈连续一排，雌性无；指瓣公式为3 - 4 - 5 - 4（前足）和4 - 5 - 5 - 5（后足）；泄殖腔距单一，两性均有；头部侧面的深色条纹不明显；骶后部斑纹为奶油色，且有向前突出的臂。在系统发育分析中，新物种被置于一个包含独山半叶趾虎（H. dushanensis）、香港半叶趾虎（H. hongkongensis）、惠水半叶趾虎（H. huishuiensis）、玉山半叶趾虎（H. ngocsonensis）和祖氏半叶趾虎（H. zugi）的分支中。基于线粒体基因ND2的一个片段，新物种与其他同属物种的成对遗传距离至少为5.9% - 6.6%。
