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Zoological Research    2018, Vol. 39 Issue (3) : 220-240     DOI: 10.24272/j.issn.2095-8137.2018.008
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A new species of smooth skink (Squamata: Scincidae: Scincella) from Cambodia
Thy Neang1,*, Somaly Chan2, Nikolay A. Poyarkov, Jr.3,4,*
1 Wild Earth Allies, Sk. Phnom Penh Thmei, Kh. Sen Sok, Phnom Penh, Cambodia
2 Ministry of Environment, Sk. Tonle Bassac, Kh. Chamkarmorn, Phnom Penh, Cambodia
3 Department of Vertebrate Zoology, Biological Faculty, Lomonosov Moscow State University, Moscow 119234, Russia
4 Joint Russian-Vietnamese Tropical Research and Technological Centre, Nghia Do, Cau Giay, Hanoi, Vietnam
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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 reevesiiS. 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.
Keywords
Mondulkiri      Keo Seima Wildlife Sanctuary      Taxonomy      mtDNA      COI      DNA barcoding      Phylogenetics
     
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Corresponding Authors: Thy Neang,Nikolay A. Poyarkov, Jr.,E-mail: thyneang9@gmail.com; n.poyarkov@gmail.com   
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Thy Neang, Somaly Chan, Nikolay A. Poyarkov, Jr.. A new species of smooth skink (Squamata: Scincidae: Scincella) from Cambodia. Zoological Research, 2018, 39(3): 220-240.
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http://www.zoores.ac.cn/EN/10.24272/j.issn.2095-8137.2018.008     OR     http://www.zoores.ac.cn/EN/Y2018/V39/I3/220
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