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Sphenomorphus sungaicolus SUMARLI, GRISMER, WOOD, AHMAD, RIZAL, ISMAIL, IZAM, AHMAD & LINKEM, 2016

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Higher TaxaScincidae, Sphenomorphinae (Sphenomorphini), Scincoidea, Sauria, Squamata (lizards)
Subspecies 
Common Names 
SynonymSphenomorphus sungaicolus SUMARLI, GRISMER, WOOD, AHMAD, RIZAL, ISMAIL, IZAM, AHMAD & LINKEM 2016 
DistributionC Peninsular Malaysia, elevation <300 m.

Type locality: Hutan Lipur Sekayu, Hulu Terengganu, Peninsular Malaysia (4°59'N, 102°55'E) (Fig. 3 in Sumarli et al. 2016).  
Reproduction 
TypesHolotype: LSUHC 11722, Adult male, collected on 1 May 2014 by Syed A. Rizal. Paratypes. Adult female (LSUHC 11780) collected from Hutan Lipur Chemerong, Terengganu, Peninsular Malaysia (4°39'N, 103°00'E) on 4 April 2014 by Syed A. Rizal. Adult female (BPBM 43794) collected from Ulu Gombak, Selangor, Peninsular Malaysia (3°18'N, 101°47'E) on 13 June 1962 by John R. Hendrickson. Adult female (ZRC. 2.4915) collected from the Forest Research Institute Malaysia (FRIM), Kepong, Selangor, Peninsular Malaysia (3°14'N, 101°38'E) on 27 February 2001 by Tzi Ming Leong. 
DiagnosisDiagnosis: Adults reach at least 89.6 mm SVL; body slender; tail long (SVL/TL = 66.5–89.6 mm); limbs not overlapping when adpressed; dorsal scales smooth, 39–44 rows at midbody; 72–81 paravertebral scales; 74–86 ventral scale rows; four supraoculars; prefrontals widely separated or in contact; two loreal scales; supranasal absent; 18–21 lamellae beneath Toe IV; enlarged precloacal scales; dorsal body bands and lateral stripes absent; numerous thin, faded, light-colored transverse markings on back continuing onto tail to form rectangular markings; non-descript small, dark speckles on back, flanks, and tail; venter beige; palmar and plantar surfaces dark-grey; foot scalation on the postaxial margin of Toe IV exhibits a distinct line of demarcation between smooth, imbricate scales on dorsal surface and rough, tuberculate scales on ventral surface. 
CommentRelationships: S. sungaicolus sp. nov. forms a clade with the Indochinese species S. maculatus, S. indicus, and S. tersus and is the sister species of the latter.

Habitat: riparian areas coursing through lowland dipterocarp forest, along the edges of watercourses.

Distribution: see map in Sumarli et al. 2016: 33 (Fig. 1). 
Etymology“Sungai” is the Malaysian word for river and “-colus” is derived from the Latin meaning “dweller in”. The specific epithet sungaicolus refers the obligate riparian nature of this new species. 
References
  • GRISMER, L. LEE; & EVAN S. H. QUAH 2019. An updated and annotated checklist of the lizards of Peninsular Malaysia, Singapore, and their adjacent archipelagos. Zootaxa 4545 (2): 230–248 - get paper here
  • NUR-AMALINA M.I.; AZHARI, M., NORSHAQINAH, A., NOR AZRIN, N.A., SHUKOR, M.N., AISAH, M.S., AMIRRUDIN, A., GRISMER, L.L. and NORHAYATI, A. 2017. SPECIES COMPOSITION OF AMPHIBIANS AND REPTILES IN TEMBAT FOREST RESERVE, HULU TERENGGANU, TERENGGANU, PENINSULAR MALAYSIA. Malays. Appl. Biol. 46 (4): 119–129 - get paper here
  • SUMARLI, ALEXANDRA; L. LEE GRISMER, PERRY L., JR. WOOD, AMIRRUDIN B. AHMAD, SYED RIZAL, LUKMAN H. ISMAIL, NUR AMALINA MOHD IZAM, NORHAYATI AHMAD, CHARLES W. LINKEM 2016. The first riparian skink (Genus: Sphenomorphus Strauch, 1887) from Peninsular Malaysia and its relationship to other Indochinese and Sundaic species. Zootaxa 4173 (1): 029–044 - get paper here
 
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