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Cyrtodactylus chamba AGARWAL, KHANDEKAR & BAUER, 2018

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Higher TaxaGekkonidae, Gekkota, Sauria, Squamata (lizards: geckos)
Common NamesE: Chamba bent-toed gecko 
SynonymCyrtodactylus chamba AGARWAL, KHANDEKAR & BAUER 2018
Cyrtodactylus sp. Chamba — AGARWAL et al. 2014 
DistributionIndia (Himachal Pradesh)

Type locality: Chamba (32.47656° N, 76.21076° E; ca. 1130 m asl.), Chamba District, Himachal Pradesh state, India  
TypesHolotype: BNHS 2332, adult male, collected by T. Khichi and I. Agarwal, 04 June 2011. Paratypes. BNHS 2330, BNHS 2331 & BNHS 2333 adult male, adult female, and juvenile male, same collection data as holotype. BNHS 2334–2335, adult females, Chamba (32.55826° N, 76.126333° E; ca. 960 m asl.), other collection data same as holotype. 
DiagnosisDiagnosis and comparison with regional congeners. Cyrtodactylus chamba sp. nov. may be distinguished from all regional congeners by a combination of small body size (SVL up to 63.1 mm), 9–12 SL, 8–10 IL, 33–43 MVSR, relatively short digits and lamellae; heterogeneous dorsal scalation of small granular scales intermixed with enlarged (3–4X granules) circular, conical and feebly keeled tubercles in 13–15 rows; tubercles extending to proximal one third of tail; five precloacal pores in males; no enlarged femoral scales; no enlarged series of subcaudals, a dorsal colour pattern of 5–7 irregular, broad, dark bands with much narrower, light interspaces.
Cyrtodactylus chamba sp. nov. can be distinguished by the presence of five precloacal pores on males from Altiphylax stoliczkai (males without pores); Cyrtopodion mansarulum and Cyrtodactylus fasciolatus (both femoral and precloacal pores present on males); and the species in which males have a relatively large precloacal pore series—Cyrtodactylus battalensis (8–10 PcP), C. dattanensis (9–10 PcP), C. nepalensis (10 PcP). The dorsal colour pattern of irregular dark bands with much narrower light interspaces in life and 20–23 subdigital lamellae under the 4th toe (n=5) in Cyrtodactylus chamba sp. nov. differentiate it from C. mintoni (dorsal pattern of narrow black crossbars, 17 lamellae under toe IV; n =1). The five precloacal pores in males of the new species (n=3) overlap with the counts of C. lawderanus (4–9 precloacal pores on males, average 6.8, n=14, only two males from eastern Himachal Pradesh with fewer than six pores) and C. himalayanus (4–8 precloacal pores in males, average 6.0, n=9, only two males with fewer than six pores). Cyrtodactylus chamba sp. nov. can be distinguished by its dorsal scalation (homogeneous granular scales intermixed with 13–15 rows of larger, circular, conical, faintly keeled tubercles; 9–10 granules around each enlarged tubercle at midbody) and the condition of the original tail (TL > SVL) from C. lawderanus (heterogeneous granular scales intermixed with 11–15 rows of larger, circular, flattened tubercles; 7–8 granules around each enlarged tubercle at midbody; TL < SVL). Cyrtodactylus chamba sp. nov. is smaller (SVL up to 63.1 mm) and has fewer scales across the belly (33–43, mean 36.8) than C. himalayanus (SVL up to 72.6 mm, 41–43 MVSR, mean 41.8), besides having a narrower head (HW/HL 0.69, 0.67–0.71 vs. 0.73, 0.71–0.76). 
EtymologyThe specific epithet is the name of the type locality of the species and is used as a noun in apposition. Cyrtodactylus chamba sp. nov. is only known from around Chamba, in the Chamba Valley, Himachal Pradesh, India. 
  • Agarwal, Ishan; Aaron M. Bauer, Todd R. Jackman, K. Praveen Karanth 2014. Insights into Himalayan biogeography from geckos: A molecular phylogeny of Cyrtodactylus (Squamata: Gekkonidae). Molecular Phylogenetics and Evolution - get paper here
  • AGARWAL, ISHAN; AKSHAY KHANDEKAR, AARON M. BAUER 2018. A new bent-toed gecko (Squamata: Gekkonidae: Cyrtodactylus) from the Western Himalayas, Himachal Pradesh, India. Zootaxa 4446 (4): 442–454 - get paper here
  • Akman, B.; M. Z. Yildiz et al. 2018. On the herpetofauna of the East Anatolian Province of Bitlis (Turkey) (Amphibia; Reptilia). Herpetozoa 31 (1/2): 69 - 82 - get paper here
  • Grismer, L. L., Wood, P. L., Poyarkov, N. A., Le, M. D., Kraus, F., Agarwal, I., ... & Grismer, J. L. 2021. Phylogenetic partitioning of the third-largest vertebrate genus in the world, Cyrtodactylus Gray, 1827 (Reptilia; Squamata; Gekkonidae) and its relevance to taxonomy and conservation. Vertebrate Zoology 71: 101–154 - get paper here
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