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Cyrtodactylus phnomchiensis NEANG, HENSON & STUART, 2020

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Higher TaxaGekkonidae, Gekkota, Sauria, Squamata (lizards: geckos)
Subspecies 
Common Names 
SynonymCyrtodactylus phnomchiensis NEANG, HENSON & STUART 2020 
DistributionCambodia (Kampong Thom Province)

Type locality: Cambodia, Kampong Thom Province, Sandan District, Phnom Chi, Prey Lang Wildlife Sanctuary, 12°56'11.6"N, 105°39'17.1"E, 237 m elevation.  
Reproduction 
TypesHolotype. CBC 03012, adult male (Fig. 3), collected on 18 July 2019 by Thy Neang and En E.
Paratypes. All from Cambodia, Kampong Thom Province, Sandan District, Phnom Chi, Prey Lang Wildlife Sanctuary: CBC 03003, adult male, 12°56'09.2"N, 105°39'12.7"E, 269 m elevation, coll. 13 June 2019 by Thy Neang; CBC 03004, adult female, 12°56'09.7"N, 105°39'14.4"E, 271 m elevation, coll. 13 June 2019 by Thy Neang; CBC 03013, adult female, same data as holotype; CBC 03014, adult female, same data as holotype except 12°56'08.7"N, 105°39'12.6"E, 284 m elevation. 
DiagnosisDiagnosis. Cyrtodactylus phnomchiensis sp. nov. is distinguished from the 19 other named species in the C. irregularis group (Ngo and Chan 2010; Nguyen et al. 2013, 2017; Pauwels et al. 2018) by having the combination of SVL 76.1–80.7 mm; relatively long body, AG/SVL 0.451–0.481; relatively long tibia, CrusL/SVL 0.172–0.200; subdigital lamellae on fourth finger 18–20; subdigital lamellae on fourth toe 20–23; longitudinal dorsal rows of tubercles 18–20; paravertebral rows of tubercles 31–36; ventral scales 45–54; enlarged femoral scales 0–8, without pores; enlarged precloacal scales 7–10, bearing pores 4 or 5 in males, pits 1–7 in females; precloacal groove absent; median row of transverse subcaudal scales only slightly enlarged; posterior border of nuchal loop unbroken and pointed, bordered anteriorly and posteriorly by broad yellow or yellowish white band; dark brown body bands 3 or 4, the first intact, the second, third and fourth more irregular, alternating with two or three yellowish white or light brown body bands, about half the width of dark brown body bands; and yellow spots on top of head.

Comparisons. Cyrtodactylus phnomchiensis sp. nov. is distinguishable from all 19 other members of the C. irregularis group by a unique combination of morphological characters (and in mitochondrial DNA; Fig. 2).
Cyrtodactylus phnomchiensis sp. nov. differs from C. bidoupimontis Nazarov, Poyarkov, Orlov, Phung, Nguyen, Hoang & Ziegler, 2012 by having ventral scales 45–54 (vs. 38–43 in bidoupimontis), precloacal pits in females 1–7 (vs. absent in bidoupimontis), dark brown body bands larger than yellowish white or light brown dorsal bands (vs. dark brown bands, when present, narrower than light yellow dorsal bands in bidoupimontis), and distinct large yellow band on anterior margin of dark brown nuchal loop (vs. narrow light margin in bidoupimontis), and yellow spots on top of head (vs. dark spots in bidoupimontis).
Cyrtodactylus phnomchiensis sp. nov. differs from C. buchardi by having SVL 76.1– 80.7 mm (vs. 60–65 mm in buchardi), SDLF4 18–20 (vs. 14 in buchardi), SDLT4 20–23 (vs. 12–14 in buchardi), ventral scales 45–54 (vs. 30 in buchardi), LDRT 18–20 (vs. 25 in buchardi), precloacal pores in males 4–5 (vs. 9 in buchardi), and irregular dorsal body bands (vs. blotches in buchardi).
Cyrtodactylus phnomchiensis sp. nov. differs from C. bugiamapensis Nazarov, Poyarkov, Orlov, Phung, Nguyen, Hoang & Ziegler, 2012 by having LDRT 18–20 (vs. 20–24 in bugiamapensis), ventral scales 45–54 (vs. 36–46 in bugiamapensis), precloacal pores in males 4–5 (vs. 7–11 in bugiamapensis), SDLF4 18–20 (vs. 15–17 in bugiamapensis), SDLT4 20–23 (vs. 17–20 in bugiamapensis), CrusL/SVL in adult specimens 0.172–0.200 (vs. 0.144–0.157 in bugiamapensis), large nuchal loop bordered anteriorly and posteriorly by broad yellow bands (vs. narrow nuchal loop bordered by distinct narrow white lines in bugiamapensis), dark brown body bands 3–4 (vs. seven highly irregular dark blotches with light margins in bugiamapensis), and top of head with yellowish spots (vs. distinct dark brown spots in bugiamapensis).
Cyrtodactylus phnomchiensis sp. nov. differs from C. caovansungi Orlov, Nguyen, Nazarov, Ananjeva & Nguyen, 2007 by having SVL 76.1–80.7 mm (vs. 90.4–94.0 mm in caovansungi), ventral scales 45–54 (vs. 38–44 in caovansungi), femoral pores absent (vs. 6 in caovansungi), precloacal pores in males 4–5 (vs. 9 in caovansungi), SDLF4 18– 20 (vs. 22 in caovansungi), and enlarged subcaudals absent (vs. present in caovansungi).
Cyrtodactylus phnomchiensis sp. nov. differs from C. cattienensis Geissler, Nazarov, Orlov, Böhme, Phung, Nguyen & Ziegler, 2009 by having SVL 76.1–80.7 mm (vs. 69.0 mm maximum in cattienensis), ventral scales 45–54 (vs. 28–42 in cattienensis), SDLF4 18–20 (vs. 12–16 in cattienensis), and SDLT4 20–23 (vs. 14–19 in cattienensis).
Cyrtodactylus phnomchiensis sp. nov. differs from C. cucdongensis Schneider, Phung, Le, Nguyen & Ziegler, 2014 by having SVL 76.1–80.7 mm (vs. 55.8–65.9 mm in cucdongensis), ventral scales 45–54 (vs. 35–44 in cucdongensis), SDLF4 18–20 (vs. 13–18 in cucdongensis), and SDLT4 20–23 (vs. 15–20 in cucdongensis).
Cyrtodactylus phnomchiensis sp. nov. differs from C. cryptus Heidrich, Rösler, Vu, Böhme & Ziegler, 2007 by having precloacal pores in males 4–5 (vs. 9–11 in cryptus), and precloacal pits in females 1–7 (vs. absent in cryptus).
Cyrtodactylus phnomchiensis sp. nov. differs from C. dati Ngo, 2013 by having SVL 76.1–80.7 mm (vs. 70.1 mm maximum in dati), regenerated TaL 56.9–79.1 mm vs. (vs. 50.3 mm maximum, non-regenerated TaL in dati), femoral pores in both sexes absent (vs. present in dati), nuchal loop continuous (vs. broken in dati), and dark brown body bands (vs. irregular dark brown blotches on body in dati).
Cyrtodactylus phnomchiensis sp. nov. differs from C. gialaiensis Luu, Dung, Nguyen, Le & Ziegler, 2017 by having SVL 76.1–80.7 mm (vs. 62.8 mm maximum in gialaiensis), precloacal pores in males 4–5 (vs. 9–10 in gialaiensis), SDLF4 18–20 (vs. 14–15 in gialaiensis), and SDLT4 20–23 (vs. 15–17 in gialaiensis).
Cyrtodactylus phnomchiensis sp. nov. differs from C. huynhi Ngo & Bauer, 2008 by having SDLF4 18–20 (vs. 14–17 in huynhi), AGL/SVL 0.451–0.481 (vs. 0.370–0.428 in huynhi), ventral scales 45–54 (vs. 43–46 in huynhi), precloacal pores in males 4–5 (vs. 7–9 in huynhi), dark brown body bands 3–4 (vs. 5–6 in huynhi); femoral pores in both sexes absent (vs. 3–8 in huynhi), and nuchal loop bordered anteriorly and posteriorly by broad yellow bands (vs. narrow cream margin in huynhi).
Cyrtodactylus phnomchiensis sp. nov. differs from C. irregularis by lacking enlarged triangular tubercles at base of tail (vs. present in irregularis), CrusL/SVL 0.172–0.200 (vs. 0.138–0.156 in irregularis), LDRT 18–20 (vs. 22–24 in irregularis), paravertebral tubercles 31–36 (vs. 38–48 in irregularis); ventral scales 45–54 (vs. 38–45 in irregularis), SDLF4 18–20 (vs. 15–16 in irregularis), SDLT4 20–23 (vs. 18–20 in irregularis), dark brown body bands 3–4 (vs. 5–7, mostly as irregular blotches in irregularis), and yellowish spots on top of head (vs. distinct dark brown spots in irregularis).
Cyrtodactylus phnomchiensis sp. nov. differs from C. kingsadai Ziegler, Phung, Le & Nguyen, 2013 by having SVL 76.1–80.7 mm (vs. 83.0–94.0 mm in kingsadai), enlarged femoral scales 0–8 (vs. 9–12 in kingsadai), precloacal pore in males 4–5 (vs. 7–9 in kingsadai), and subcaudal scales not enlarged (vs. enlarged in kingsadai).
Cyrtodactylus phnomchiensis sp. nov. differs from C. phuocbinhensis Nguyen, Le, Tran, Orlov, Lathrop, MacCulloch, Le, Jin, Nguyen, Nguyen, Hoang, Che, Murphy & Zhang, 2013 by having SVL 76.1–80.7 mm (vs. 46.0–60.4 in phuocbinhensis); precloacal pits in females 1–7 (vs. absent in phuocbinhensis), top of head with yellow spots (vs. dark brown spots in phuocbinhensis), and dark brown body bands (vs. two dark brown longitudinal stripes or blotches in phuocbinhensis).
Cyrtodactylus phnomchiensis sp. nov. differs from C. pseudoquadrivirgatus Rösler, Vu, Nguyen, Ngo & Ziegler, 2008 by having yellow spots on top of head (vs. dark blotches on top of head in pseudoquadrivirgatus) and dark brown body bands (vs. highly irregular body blotches in pseudoquadrivirgatus).
Cyrtodactylus phnomchiensis sp. nov. differs from C. sangi Pauwels, Nazarov, Bobrov & Poyarkov, 2018 by having SVL 76.1–80.7 mm (vs. 56.3 mm maximum in sangi), paravertebral tubercles 31–36 (vs. 27–29 in sangi), ventral scales 45–54 (vs. 37 in sangi), precloacal pores in males 4–5 (vs. 7 in sangi), and first dark brown body band complete, second, third, and fourth more irregular (vs. highly irregular bands in sangi).
Cyrtodactylus phnomchiensis sp. nov. differs from C. takouensis Ngo & Bauer, 2008 by having LDRT 18–20 (vs. 9–10 smooth tubercles in takouensis); ventral scales 45–54 (vs. 39–40 in takouensis), SDLF4 18–20 (vs. 16–17 in takouensis), SDLT4 20–23 (vs. 18–20 in takouensis), and dark brown canthal stripe absent (vs. present in takouensis).
Cyrtodactylus phnomchiensis sp. nov. differs from C. taynguyenensis Nguyen, Le, Tran, Orlov, Lathrop, MacCulloch, Le, Jin, Nguyen, Nguyen, Hoang, Che, Murphy & Zhang, 2013 by having supralabials 11–13 (vs. 8–9 in taynguyenensis), precloacal pits in females present (vs. absent in taynguyenensis), SDLF 18–20 (vs. 13–18 in taynguyenensis), top of head with yellow spots (vs. dark brown blotches in taynguyenensis), and dark brown body bands (vs. black irregular blotches margined by light brown in taynguyenensis).
Cyrtodactylus phnomchiensis sp. nov. differs from C. yangbayensis Ngo & Chan, 2010 by having SDLT4 20–23 (vs. 15–17 in yangbayensis) and lacking enlarged subcaudal scales (vs. present in yangbayensis).
Cyrtodactylus phnomchiensis sp. nov. is most closely related in mitochondrial DNA to C. ziegleri Nazarov, Orlov, Nguyen & Ho, 2008 (Fig. 2), but differs in morphology from C. ziegleri by having SVL 76.1–80.7 mm (vs. 84.6–93.0 mm in ziegleri), paravertebral tubercles 31–36 (vs. 38–46 in ziegleri), ventral scales 45–54 (vs. 33–45 in ziegleri), HeadL/SVL 0.287–0.305 (vs. 0.263–0.284 in ziegleri), ESD/SVL 0.116– 0.123 (vs. 0.103–0.113 in ziegleri), CrusL/SVL 0.172–0.200 (vs. 0.140–0.168 in ziegleri), AG/SVL 0.451–0.481 (vs. 0.390–0.444 in ziegleri), eyeD/SVL 0.059–0.067 (vs. 0.053–0.057 in ziegleri), top of head with yellow spots (vs. dark brown spots in ziegleri), large dark brown nuchal loop (vs. narrow in ziegleri), distinct, broad yellow band on anterior margin of dark brown nuchal loop (vs. absent in ziegleri), and dark brown body bands bordered by yellowish white or light brown bands about half the width of dark brown bands (vs. light yellow or light brown body bands about same width as dark brown body bands in ziegleri). 
CommentDistribution: for a map see Neang et al. 2020: 138 (Fig. 1). 
References
  • Neang T, Henson A, Stuart BL 2020. A new species of Cyrtodactylus (Squamata, Gekkonidae) from Cambodia’s Prey Lang Wildlife Sanctuary. ZooKeys 926: 133-158 - get paper here
 
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