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Thy Neang, Somaly Chan, Nikolay A. Poyarkov, Jr.. 2018: 柬埔寨发现滑蜥属一新种(爬行纲:石龙子科). 动物学研究, 39(3): 220-240. DOI: 10.24272/j.issn.2095-8137.2018.008
引用本文: Thy Neang, Somaly Chan, Nikolay A. Poyarkov, Jr.. 2018: 柬埔寨发现滑蜥属一新种(爬行纲:石龙子科). 动物学研究, 39(3): 220-240. DOI: 10.24272/j.issn.2095-8137.2018.008
Thy Neang, Somaly Chan, Nikolay A. Poyarkov, Jr.. 2018: A new species of smooth skink (Squamata: Scincidae: Scincella) from Cambodia. Zoological Research, 39(3): 220-240. DOI: 10.24272/j.issn.2095-8137.2018.008
Citation: Thy Neang, Somaly Chan, Nikolay A. Poyarkov, Jr.. 2018: A new species of smooth skink (Squamata: Scincidae: Scincella) from Cambodia. Zoological Research, 39(3): 220-240. DOI: 10.24272/j.issn.2095-8137.2018.008

柬埔寨发现滑蜥属一新种(爬行纲:石龙子科)

A new species of smooth skink (Squamata: Scincidae: Scincella) from Cambodia

  • 摘要: 本研究结合形态及DNA遗传分子数据,探究了来自柬埔寨蒙多基里省(Mondulkiri Province)的寨克赛马保护区(Keo Seima Wildlife Sanctuary)的林栖(forest-dwelling)石龙子种群的分类地位。依据668bp的线粒体COI DNA数据及形态鉴别特征,该种群的林栖石龙子隶属于南滑蜥Scincella reevesii––红尾滑蜥S. rufocaudata种组,并且不同于该种组任何物种,因此将其描述为一新种,黑纹滑蜥Scincella nigrofasciata sp. nov. 。该新种凭借以下形态特征与东南亚同属近缘物种区分:1)吻肛距40.0–52.6 mm;2)尾长为吻肛距的1.25–1.94倍;3)前额鳞相接明显;4)下唇鳞6枚;5)前肢长为吻肛距0.20–0.22倍;6)后肢长为吻肛距0.30–0.33倍;7)小臂长为吻肛距的0.14–0.16倍;8)前后肢贴体弯曲后或重叠0.4–2.2 mm,或间隔1.9–2.3 mm;9)体中段环体鳞片32或33枚;10)平脊体纵鳞片69–74枚;11)体背纵纹间鳞片8枚;12)指、趾相对较修长;13)第四趾下鳞15–17枚;14)深色不连续体背躯干纵纹5–7条;15)体侧深色纵纹延伸至尾长的52%–86%处。同时该文提供了红尾滑蜥正模的信息,并且为S. rupicola的有效性提供了额外证据。本研究将柬埔寨的滑蜥总数提高到5种,同时再一次凸显了该国两栖爬行动物多样性研究的匮乏。

     

    Abstract: Based on morphological and genetic evidence we evaluated the taxonomic status of a newly discovered forest-dwelling population of skink (genus Scincella) from the Keo Seima Wildlife Sanctuary, Mondulkiri Province, Cambodia. From phylogenetic analysis of a 668-bp fragment of the mtDNA COI and diagnostic morphological characters we allocate the newly discovered population to the Scincella reevesii–S. rufocaudata species complex and describe it as Scincella nigrofasciata sp. nov. The new skink species can be distinguished from all other Southeast Asian congeners by the following combination of morphological characters: snout-vent length (SVL) 40.0–52.6 mm; relative tail length (TaL/SVL ratio) 1.25–1.94; prefrontals in broad contact; infralabials 6; primary temporals 2; relative forelimb length (FIL/SVL ratio) 0.20–0.22; relative hindlimb length (HIL/SVL ratio) 0.30–0.33; relative forearm length (FoL/SVL ratio) 0.14–0.16; adpressed forelimbs and hind limbs either overlapping (0.4–2.2 mm) or separated (1.9–2.3 mm); midbody scale rows 32–33, paravertebral scales 69–74, vertebral scales 65–69; dorsal scales between dorsolateral stripes 8; comparatively slender fingers and toes, subdigital lamellae under fourth toe 15–17; dark discontinuous regular dorsal stripes 5–7; distinct black dorsolateral stripes, narrowing to lateral sides and extending to 52%–86% of total tail length. We provide additional information on the holotype of Scincella rufocaudata (Darevsky & Nguyen, 1983), and provide evidence for the species status of Scincella rupicola. Our discovery brings the number of Scincella species in Cambodia to five and emphasizes the incompleteness of knowledge on the herpetofaunal diversity of this country.

     

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