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Higher TaxaGekkonidae, Gekkota, Sauria, Squamata (lizards: geckos)
Common NamesE: Darevsky’s Bent-toed Gecko 
DistributionLaos (Khammouane)

Type locality: environs of Na Phao Village, Boulapha District, Khammouane Province, Laos (17°34 ́57.1 ́ ́N, 105°44 ́37.3 ́ ́E; elevation 170 m a.s.l.)  
Reproductionoviparous (manual imputation, fide Zimin et al. 2022) 
TypesHolotype: ZMMU R-13980, Adult male (field number F185) collected on 18 June 2009 by Nikolai Orlov, Sang Ngoc Nguyen and Konstantin Milto. Paratypes. Three adult males (ZMMU R-13981- 1; 13981-2 (FN 186, 187); ZIN 28247 (FN 256), two adult females (ZMMU 13981-3 (1999); ZIN 28248 (FN 188) and one subadult ZIN 28249 (FN 189). All members of the type series with the same collection data as the holotype. 
DiagnosisDiagnosis: A large sized, slender Cyrtodactylus with a maximum SVL of 100 mm; the new species is distinguished from all congeners by the following morphological characters. Dorsal color pattern consisting of narrow dark nuchal band and 4–5 dark transversal breaking bands with light yellowish edge between limbs and 8–10 transversal dark bands on the tail. Dorsal surface of head very light brown, sometimes with a yellowish tinge, with few small irregular roundish dark brown spots. Dorsal of head and temporal region, body, hind limbs and base of tail covered by rounded, keeled tubercles, which are 2–3 times larger than the surrounding scales. Ventrals in 38–46 longitudinal rows at midbody, lateral folds are not strongly developed. Continuous series of 38–44 precloacal and femoral pores in males and 24–34 precloacal and femoral pores in females. Subcaudals in transversally enlarged median row, flat, smooth, imbricate. No enlarged keeled tubercles on the dorsal surface of the tail; 4–5 postcloacal spurs in both sexes. 
CommentAbundance: only known from its original description (Meiri et al. 2017). 
EtymologyCyrtodactylus darevskii sp. nov. is named for the honor of the famous Ukrainian-born Russian herpetologist Ilya Sergeevich Darevsky (1924–2009). 
  • 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
  • Nazarov, R.A.; N.A. Poyarkov Jr., N.L. Orlov, N.S. Nguyen, K.D. Milto, A.A. Martynov, E.L. Konstantinov and A.S. Chulisov 2015. A review of genus Cyrtodactylus (Reptilia: Sauria: Gekkonidae) in fauna of Laos with description of four new species. Труды Зоологического института РАН 318 (4): 391–423 [Proceedings of the Zoological Institute RAS 318(4):391-423, 2014]
  • Zimin, A., Zimin, S. V., Shine, R., Avila, L., Bauer, A., Böhm, M., Brown, R., Barki, G., de Oliveira Caetano, G. H., Castro Herrera, F., Chapple, D. G., Chirio, L., Colli, G. R., Doan, T. M., Glaw, F., Grismer, L. L., Itescu, Y., Kraus, F., LeBreton 2022. A global analysis of viviparity in squamates highlights its prevalence in cold climates. Global Ecology and Biogeography, 00, 1–16 - get paper here
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