Ampai Natee, Rujirawan Attapol, Yodthong Siriporn, Termprayoon Korkhwan, Stuart Bryan L, Aowphol Anchalee
Department of Biology, Faculty of Science, Srinakharinwirot University, Bangkok, 10110 Thailand.
Animal Systematics and Ecology Speciality Research Unit, Department of Zoology, Faculty of Science, Kasetsart University, Bangkok, 10900 Thailand.
Zookeys. 2024 Sep 3;1211:101-130. doi: 10.3897/zookeys.1211.122563. eCollection 2024.
A new karst-dwelling bent-toed gecko of the group is described from Khlong Hat District, Sa Kaeo Province, eastern Thailand, based on an integrative taxonomic analysis of genetic data and morphological characteristics. Phylogenetic analyses using the mitochondrial NADH dehydrogenase subunit 2 (ND2) gene revealed that topotypes of were sister to a clade containing from Cambodia, an unnamed lineage from Sakaerat Biosphere Reserve in Nakhon Ratchasima Province, Thailand, and the Khlong Hat lineage described here as Multivariate analyses of morphometric and meristic characters showed that is morphologically distinct from all other species in the group by having the combination of SVL 76.5-82.8 mm in adult males and 88.5 mm in an adult female; eight supralabial and nine infralabial scales; 30-32 paravertebral tubercles; 20 or 21 longitudinal rows of dorsal tubercles; 43 or 44 ventral scales; seven or eight expanded subdigital lamellae on the 4 toe; 12 unmodified subdigital lamellae on the 4 toe; 19 or 20 total subdigital lamellae on the 4 toe; 31 or 32 total number of enlarged femoral scales; enlarged femoral and precloacal scales continuous; 6-8 pore-bearing precloacal scales in males; three or four rows of enlarged post-precloacal scales; 1-3 postcloacal tubercles; proximal femoral scales less than one-half the size of distal femoral scales; absence of interdigital pocketing between digits of forefeet and hindfeet; and posterior border of the nuchal loop rounded. Uncorrected pairwise genetic divergences (-distances) between the new species and other species of the group ranged from 4.73-22.55%. The discovery of this new species exclusively in isolated karst formations from the Thai-Cambodia border suggests that there may be further undiscovered in unexplored karst landscapes along the border of eastern Thailand and western Cambodia.
基于对遗传数据和形态特征的综合分类分析，在泰国东部北柳府呵叻县描述了该类群一种新的栖息于喀斯特地区的弯趾壁虎。使用线粒体烟酰胺腺嘌呤二核苷酸脱氢酶亚基2（ND2）基因进行的系统发育分析表明，该物种的地模标本是一个分支的姐妹群，该分支包含来自柬埔寨的物种、泰国呵叻府沙拉武里生物圈保护区一个未命名的谱系以及此处描述为该新物种的呵叻谱系。形态测量和可数性状的多变量分析表明，该新物种在形态上与该类群的所有其他物种不同，成年雄性的体长为76.5 - 82.8毫米，成年雌性为88.5毫米；有8枚上唇鳞和9枚下唇鳞；30 - 32个椎旁瘤；20或21排背瘤；43或44枚腹鳞；第4趾有7或8枚扩大的亚趾下鳞；第4趾有12枚未修饰的亚趾下鳞；第4趾共有19或20枚亚趾下鳞；股部扩大鳞片总数为31或32枚；扩大的股部和泄殖腔前鳞片连续；雄性有6 - 8枚有孔的泄殖腔前鳞片；3或4排扩大的泄殖腔后鳞片；1 - 3个泄殖腔后瘤；近端股部鳞片小于远端股部鳞片大小的一半；前足和后足趾间无指蹼；颈环后缘圆形。新物种与该类群其他物种之间的未校正成对遗传差异（-距离）范围为4.73 - 22.55%。仅在泰国 - 柬埔寨边境的孤立喀斯特地层中发现这一新物种，表明在泰国东部和柬埔寨西部边境未开发的喀斯特景观中可能还有更多未被发现的该类群物种。
