Faculty of Environmental Sciences, University of Science, Vietnam National University, Hanoi, 334 Nguyen Trai Road, Hanoi, Vietnam .
Institute of Apply Technology, 6 Tran Van On, Thu Dau Mot City, Binh Duong Province, Vietnam. .
Zootaxa. 2021 Jul 8;4999(1):58-76. doi: 10.11646/zootaxa.4999.1.4.
A new species of the Cyrtodactylus irregularis group is described from Ninh Thuan Province, southern Vietnam based on molecular divergence and morphological differences. Cyrtodactylus orlovi sp. nov. is distinguished from the remaining Indochinese bent-toed geckos by having the unique combination of the following characters: size medium (SVL 61.077.7 mm); dorsal tubercles in 1620 irregular rows; 3639 ventral scale rows; precloacal pores absent in females, 5 or 6 in males, in a continuous row; femoral pores absent; 38 enlarged femoral scales; postcloacal spurs 1 or 2; lamellae under toe IV 1619; a continuous neckband; a highly irregular transverse banded dorsal pattern; the absence of transversely enlarged median subcaudal scales. In phylogenetic analyses, the new species was revealed to be the sister taxon to a clade consisting of Cyrtodactylus cattienensis and the most recently described species from Vietnam, C. chungi, with 12.112.4% and 11.7 % pairwise genetic divergence from the two species, respectively, based on a fragment of the mitochondrial COI gene.
描述了来自越南南部宁顺省的一个新的不规则栉趾虎属物种，该物种基于分子差异和形态差异与其他印度支那弯趾壁虎区分开来。新种 Cyrtodactylus orlovi 与其余的印度支那弯趾壁虎的区别在于具有以下独特组合的特征：中等大小（SVL 61.077.7 毫米）；背部有 16-20 行不规则的小结节；腹鳞 36-39 行；雌性无后肛孔，雄性有 5 或 6 个，呈连续行；股孔缺失；有 38 个增大的股鳞；后肛刺 1 或 2 个；第四趾下的趾垫 16-19 个；有连续的颈环；高度不规则的横带式背部图案；没有横向增大的中尾鳞。在系统发育分析中，新种与由 Cyrtodactylus cattienensis 和最近在越南描述的物种 C. chungi 组成的进化枝关系最为密切，基于线粒体 COI 基因的一个片段，与这两个物种的遗传差异分别为 12.1%-11.7%。
