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Cyrtodactylus sommerladi LUU, BONKOWSKI, NGUYEN, LE, SCHNEIDER, NGO & ZIEGLER, 2016

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Higher TaxaGekkonidae, Gekkota, Sauria, Squamata (lizards: geckos)
Subspecies 
Common NamesE: Sommerlad’s Bent-toed Gecko
Laotian: Ki Chiem Sommerlad 
SynonymCyrtodactylus sommerladi LUU, BONKOWSKI, NGUYEN, LE, SCHNEIDER, NGO & ZIEGLER 2016 
DistributionC Laos

Type locality: karst forest, Hang Toi region, Noong Ma Village (17°17.795’N, 106°08.738’E, elevation 572 m a.s.l.) within Hin Nam No NPA, Khammouane Province, central Laos.  
Reproductionoviparous (not imputed, fide Zimin et al. 2022) 
TypesHolotype: VNUF R.2013.22 adult male, collected on 05 May 2013 by V. Q. Luu and N. V. Ha. Paratypes. NUOL R-2013.23, IEBR A.2015.37, ZFMK 97196, VNUF R.2013.105, VNUF R.2014.87, NUOL R-2013.14, IEBR A.2015.39, NUOL R-2013.21, IEBR A.2015.38, VNUF R.2013.104, ZFMK 97197, VNUF R.2014.89, VNUF R.2013.67 the same locality as the holotype. IEBR A.2015.40 adult female, in karst forest, Cha Lou Village (17°18.880’N, 105°57.103’E, elevation 572 m a.s.l.) within Hin Nam No NPA, Khammouane Province, central Laos, collected on 25 May 2013. 
DiagnosisDiagnosis: Cyrtodactylus sommerladi sp. nov. is characterized by: Adult SVL 72.3 ± 3.8 mm (mean ± SD); dorsal head greyish brown without dark blotches; nuchal loop present, narrow, not enlarged posteriorly; five or six dark transverse bands between limbs; dorsal surface with homogenous, tubercle-like scales; ventral scales at midbody 31–39; ventrolateral skin folds present; ventral scale rows from mental to cloacal slit 168–192; scale rows at midbody 76–93; precloacal-femoral pores 20–26 in males, 17–21 in females; enlarged femoral and precloacal scales present; postcloacal tubercles 4–6; subcaudal scales slightly enlarged.


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CommentNatural history. Specimens were collected at night from 19:20 to 21:43h, mainly on karst walls, ca. 1–4.5 m above the ground, near cave entrances in the limestone forest, at elevations between 269 and 614 m a.s.l. Two female specimens IEBR A.2015.38 and ZFMK 97197 were found on tree trunks, about 1–2 m from the forest floor. The surrounding habitat was karst forest dominated by species of Ebenaceae, Dracaenaceae, Arecaeae, Poaceae, Meliaceae, and Moraceae. The relative humidity was between 74% and 90%, and temperatures ranged from 22.7 to 29.9°C (see Table 10). Female specimens contained eggs in May, by contrast, no records of gravid females or hatchlings were made in March. Thus, the breeding season seems to start only in April or May. The majority of the caves, karst walls, and karst forests where Cyrtodactylus sommerladi sp. nov. have been explored had dry surfaces, without flowing streams inside (e.g., Ellis & Pauwels 2012). 
EtymologyNamed after Ralf Sommerlad, a friend of the authors, and late Regional vice chairman of the IUCN SSC Crocodile Specialist Group (CSG) for Europe, who passed away on 11 June 2015, to honor his lifework and strong commitment for reptile conservation 
References
  • Ellis, M. & Pauwels, O.S.G. 2012. The bent-toed geckos (Cyrtodactylus) of the caves and karst of Thailand. Cave and Karst Science, 39 (1): 16–22
  • 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
  • Kwet, Axel 2017. Neue Arten: Liste der im Jahr 2016 neu beschriebenen Reptilien. Terraria-Elaphe 2017 (3): 54-70 - get paper here
  • LUU, VINH QUANG; MICHAEL BONKOWSKI, Truong QUang Nguyen, MINH DUC LE, NICOLE SCHNEIDER, HANH THI NGO, THOMAS ZIEGLER 2016. Evolution in karst massifs: Cryptic diversity among bent-toed geckos along the Truong Son Range with descriptions of three new species and one new country record from Laos. Zootaxa 4107 (2): 101–140 - get paper here
  • VAN DUONG, T. A. N. G., VAN VU, L. I. E. N., VU, H. T. T., MULCAHY, D., BRAGIN, A. M., POyARKOV Jr, N. A., & GRISMER, L. 2024. Another new species of Cyrtodactylus Gray, 1927 (Squamata: Gekkonidae) of the angularis group from the karstic landscape of Phong Nha-Ke Bang National Park, central Vietnam. Zootaxa, 5471(5): 555-571 - get paper here
  • 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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