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PoyarkovNikolay A., NguyenTan Van, 杨剑焕, GorinVladislav A.. 2021: 越南南部朗边高原小姬蛙属(两栖纲,无尾目,姬蛙科)一新种. 动物学研究, 42(6): 726-733. DOI: 10.24272/j.issn.2095-8137.2021.228
引用本文: PoyarkovNikolay A., NguyenTan Van, 杨剑焕, GorinVladislav A.. 2021: 越南南部朗边高原小姬蛙属(两栖纲,无尾目,姬蛙科)一新种. 动物学研究, 42(6): 726-733. DOI: 10.24272/j.issn.2095-8137.2021.228
Nikolay A. Poyarkov, Tan Van Nguyen, Jian-Huan Yang, Vladislav A. Gorin. 2021: A new species of Micryletta (Amphibia: Anura: Microhylidae) from the Langbian Plateau in southern Vietnam. Zoological Research, 42(6): 726-733. DOI: 10.24272/j.issn.2095-8137.2021.228
Citation: Nikolay A. Poyarkov, Tan Van Nguyen, Jian-Huan Yang, Vladislav A. Gorin. 2021: A new species of Micryletta (Amphibia: Anura: Microhylidae) from the Langbian Plateau in southern Vietnam. Zoological Research, 42(6): 726-733. DOI: 10.24272/j.issn.2095-8137.2021.228

越南南部朗边高原小姬蛙属(两栖纲,无尾目,姬蛙科)一新种

A new species of Micryletta (Amphibia: Anura: Microhylidae) from the Langbian Plateau in southern Vietnam

  • 摘要: 该文基于形态学及分子生物学证据描述采集自越南南部郎边高原林同省比豆普奴伊巴国家公园的姬蛙属一新种。新种黑眼小姬蛙Micryletta melanops sp. nov. 与同属其它物种在形态上的区别在于:体型小,雌性体长22.4 mm;虹膜全黑色;吻部背面观近平钝,侧面观微微钝圆;后肢贴体前伸时胫跗关节达眼睛;体背皮肤光滑;颞褶明显;无外蹠突;趾末端微微膨大呈小吸盘;指间无蹼,趾间微蹼;生活时头和身体背部橙红色,有小且无规则的深棕色斑纹;四肢背面散布有红棕色小斑点;体侧由前部的深棕色逐渐过渡为后部的灰棕色,腹股沟处带有棕色斑点;头侧黑棕色且无白色斑纹;腹面深灰色无斑纹。新种与同属其它物种在16S rRNA基因序列上的种间遗传距离为2.6%–5.8%。依据IUCN物种红色名录濒危等级和标准,该研究建议将新种黑眼小姬蛙暂列为数据缺乏。

     

    Abstract: We report a new species of the genus Micryletta from the montane evergreen forest in the Bidoup-Nui Ba National Park, Lam Dong Province, Langbian Plateau, southern Vietnam, based on molecular and morphological evidence. The new species is diagnosed by a combination of the following morphological characters: body size small (snout-vent length (SVL) 22.4 mm, single female); iris uniform black; snout nearly truncate in dorsal view, slightly rounded in profile; tibiotarsal articulation of adpressed limb reaching level of eye; dorsal surface smooth; supratympanic fold present, prominent; outer metatarsal tubercle absent; tips of toes very weakly dilated into small discs; finger webbing absent, toe webbing rudimentary; dorsal surfaces of head and body orange-red with small irregularly shaped dark-brown patches; dorsal surface of limbs pale dark brown with small reddish speckles; body flanks dark brown anteriorly fading to grayish brown posteriorly with brown spots in groin area; lateral sides of head immaculate blackish brown without white patches; coloration of ventral surfaces immaculate dark gray. The new species is divergent from all other congeners in 16S rRNA gene sequences (2.6%–5.8%). Following the IUCN Red List Categories and Criteria, we propose the new species be listed as Data Deficient (DD).

     

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