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Higher TaxaGekkonidae, Gekkota, Sauria, Squamata (lizards: geckos)
Common NamesThai: Took-kai Sai Yok
E: Sai Yok bent-toed gecko
F: Cyrtodactyle de Saï Yok
G: Saiyok Bogenfingergecko
Dutch: Saiyokkromvingergekko 
SynonymCyrtodactylus saiyok PANITVONG, SUMONTHA, TUNPRASERT & PAUWELS 2014 
DistributionW Thailand (Kanchanaburi)

Type locality: Moo (= village) 3 (14o 12.186’ N, 099o 01.471’ E, 354 m asl), Tumbon (= sub-district) Wang Krajae, Amphoe (= District) Sai Yok, Kanchanaburi Province, western Thailand  
TypesHolotype: THNHM 25602 (field no. MS 457); adult male; collected by Jitthep Tunprasert on 17 August 2012. Paratypes. CUMZ-R-0.2320 (field no. MS 458); subadult male, same collector and locality as holotype. 
DiagnosisDiagnosis. Cyrtodactylus saiyok sp. nov. can be distinguished from all other congeneric species by its maximal known SVL of 61.0 mm; 18 or 19 regular longitudinal rows of dorsal tubercles; 23 or 24 longitudinal rows of ventrals across the abdomen between the non-denticulate ventrolateral skin folds; a continuous series of enlarged femoro-precloacal scales, including a continuous series of five pore-bearing precloacal scales (males); no precloacal groove or depression; 16 or 17 subdigital lamellae of 4th toe, transversely enlarged subcaudal scales; complete nuchal loop; dorsal pattern including 3-5 irregular, medially interrupted or not, black dorsal bands between the limbs.
CommentHabitat: small trees, stumps, and on large Aroid plants; the species was never found on cliffs or limestone outcrops.

Abundance: only known from its original description (Meiri et al. 2017). 
EtymologyThe specific epithet saiyok refers to the name of the district in which the type locality is situated. It is a noun in apposition, invariable. 
  • LUU, VINH QUANG; THOMAS CALAME, Truong QUang Nguyen, MICHAEL BONKOWSKI & THOMAS ZIEGLER 2015. A new species of Cyrtodactylus (Squamata: Gekkonidae) from the limestone forest of Khammouane Province, central Laos. Zootaxa 4058 (3): 388–402 - get paper here
  • LUU, VINH QUANG; Truong QUang Nguyen, MINH DUC LE, MICHAEL BONKOWSKI, THOMAS ZIEGLER 2016. A new species of karst-dwelling bent-toed gecko (Squamata: Gekkonidae) from Khammouane Province, central Laos. Zootaxa 4079 (1): 087–102 - get paper here
  • Meiri, Shai; Aaron M. Bauer, Allen Allison, Fernando Castro-Herrera, Laurent Chirio, Guarino Colli, Indraneil Das, Tiffany M. Doan, Frank Glaw, Lee L. Grismer, Marinus Hoogmoed, Fred Kraus, Matthew LeBreton, Danny Meirte, Zoltán T. Nagy, Cristiano d 2017. Extinct, obscure or imaginary: the lizard species with the smallest ranges. Diversity and Distributions - get paper here
  • PANITVONG, NONN; MONTRI SUMONTHA, JITTHEP TUNPRASERT & OLIVIER S. G. PAUWELS 2014. Cyrtodactylus saiyok sp. nov., a new dry evergreen forest-dwelling Bent-toed Gecko (Squamata: Gekkonidae) from Kanchanaburi Province, western Thailand. Zootaxa 3869 (1): 064–074 - get paper here
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