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Lygosoma isodactylum (GÜNTHER, 1864)

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Higher TaxaScincidae, Lygosominae (Lygosomini), Scincoidea, Sauria, Squamata (lizards)
Subspecies 
Common NamesE: Siamese Writhing Skink, Even-toed Supple Skink
G: Gleichfinger-Laubskink 
SynonymEumeces isodactylus GÜNTHER 1864: 93
Lygosoma isodactylum — BOULENGER 1887: 339
Riopa isodactyla — SMITH 1935: 317
Squamicilia isodactyla — MITTLEMAN 1952
Riopa isodactyla — TAYLOR 1963: 968
Lygosoma isodactyla (Riopa isodactyla) — COX et al. 1998: 114
Riopa isodactyla — CHAN-ARD et al. 1999: 27
Lygosoma isodactylum — COTA et al. 2011
Lygosoma isodactylum — FREITAS et al. 2019 
DistributionCambodia, C Thailand (between Ayuthia and Paknam Po [Nakon Sawan])  
Reproduction 
TypesHolotype: BMNH 1946.8.10.69 (formerly 59.7.1.8), Camboja, collected M. Mouhot. 
DiagnosisDiagnosis: According to Günther (1864), Boulenger (1887), Taylor (1963) and Bourret (2009) the species shows the following diagnostic features: SVL 83–117 mm, longer than TaL; lower eyelids scaly; supranasals separated by rostral and fused with nasal anteriorly; frontal little longer than frontoparietal; frontoparietal single; nuchals absent; ear openings almost covered by two large scales; supralabials 7; scale rows around midbody 30–34; paravertebral scales 88–98; limbs very short (SVL/FlL: about 9; SVL/HlL: about 7); subdigital lamellae under fourth toe 7–10 (see Tables 1, 2) (Geissler et al. 2011).


Additional details (337 characters) are available for collaborators and contributors. Please contact us for details. 
CommentType species: Eumeces isodactylus is the type species of the genus Squamicilia MITTLEMAN 1952. 
References
  • Boulenger, G. A. 1887. Catalogue of the lizards in the British Museum (Nat. Hist.) III. Lacertidae, Gerrhosauridae, Scincidae, Anelytropsidae, Dibamidae, Chamaeleontidae. London: 575 pp. - get paper here
  • Chan-ard, T., Parr, J.W.K. & Nabhitabhata, J. 2015. A field guide to the reptiles of Thailand. Oxford University Press, NY, 352 pp. [see book reviews by Pauwels & Grismer 2015 and Hikida 2015 for corrections] - get paper here
  • Cota, Michael; Peter Geissler , Tanya Chan-ard and Sunchai Makchai 2011. First Record of Lygosoma angeli (Smith, 1937) (Reptilia: Squamata: Scincidae) in Thailand with Notes on Other Specimens from Laos. The Thailand Natural History Museum Journal 5(2): 125-132
  • Cox, Merel J.; Van Dijk, Peter Paul; Jarujin Nabhitabhata & Thirakhupt,Kumthorn 1998. A Photographic Guide to Snakes and Other Reptiles of Peninsular Malaysia, Singapore and Thailand. Ralph Curtis Publishing, 144 pp.
  • FREITAS, ELYSE S.; ANIRUDDHA DATTA-ROY, PRAVEEN KARANTH, L. LEE GRISMER and CAMERON D. SILER 2019. Multilocus phylogeny and a new classification for African, Asian and Indian supple and writhing skinks (Scincidae: Lygosominae). Zoological Journal of the Linnean Society 186 (4): 1067–1096 - get paper here
  • GEISSLER, PETER; TIMO HARTMANN & THY NEANG 2012. A new species of the genus Lygosoma Hardwicke & Gray, 1827 (Squamata: Scincidae) from northeastern Cambodia, with an updated identification key to the genus Lygosoma in mainland Southeast Asia. Zootaxa 3190: 56–68 - get paper here
  • Geissler, Peter; Truong Quang Nguyen, Trung My Phung, Robert Wayne Van Devender, Timo Hartmann, Balázs Farkas, Thomas Ziegler and Wolfgang Böhme 2011. A review of Indochinese skinks of the genus Lygosoma Hardwicke & Gray, 1827 (Squamata: Scincidae), with natural history notes and an identification key. Biologia 66 (6): 1159-1176 - get paper here
  • GRISMER, L. LEE; EVAN S. H. QUAH, ZAHARIL DUZULKAFLY & PAUL YAMBUN 2018. On the taxonomy of Lygosoma bampfyldei Bartlett, 1895 (Squamata: Scincidae) with descriptions of new species from Borneo and Peninsular Malaysia and the resurrection of Lygosoma schneideri Werner, 1900. Zootaxa 4438 (3): 528–550 - get paper here
  • Günther, A. 1864. The Reptiles of British India. London (Taylor & Francis), xxvii + 452 pp. - get paper here
  • Smith, M.A. 1914. Note on a rare lizard, (Lygosoma isodactylum). J. nat. Hist. Soc. Siam 1: 127-8
  • Smith, M.A. 1935. The fauna of British India, including Ceylon and Burma. Reptiles and Amphibia, Vol. II. Sauria. Taylor and Francis, London, 440 pp.
  • Taylor, E.H. 1963. The lizards of Thailand. Univ. Kansas Sci. Bull. 44: 687-1077. - get paper here
 
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