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Cyrtodactylus roesleri ZIEGLER, NAZAROV, ORLOV, NGUYEN, VU, DANG, DINH & SCHMITZ, 2010

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Higher TaxaGekkonidae, Gekkota, Sauria, Squamata (lizards: geckos)
Subspecies 
Common NamesE: Roesler’s Bent-toed Gecko
Vietnamese: Thach sung ngon ro-x-lo 
SynonymCyrtodactylus roesleri ZIEGLER, NAZAROV, ORLOV, NGUYEN, VU, DANG, DINH & SCHMITZ 2010
Cyrtodactylus roesleri — RÖSLER 2018: 92 
DistributionVietnam (Quang Binh), Laos

Type locality: nearby Phong Nha – Ke Bang National Park, Minh Hoa District, Quang Binh Province, Vietnam.  
Reproductionoviparous (manual and phylogenetic imputation, fide Zimin et al. 2022) 
TypesHolotype: ZFMK 89377, adult male, collected on 22 May 2009 by Thomas Ziegler and Kien Ngoc Dang. Paratypes. Three adult males (IEBR A.0932, MHNG 2713.79, VNUH 220509) and one juvenile (ZFMK 89378) from the type locality, collected by Thomas Ziegler and Kien Ngoc Dang on 22 May 2009; one adult female (ZFMK 86433) collected by Thomas Ziegler and Astrid Heidrich in June 2006 within Phong Nha – Ke Bang National Park, Quang Binh Province, Vietnam; ten adult males (ZISP 25777-25782, ZMMU R-13061-1, ZMMU R-13061-2, ZMMU R-13061-3, ZMMU R-13061-4) and four adult females (ZISP 25783, ZISP 25784, ZMMU R-13061-5, ZMMU R-13051-6) collected by Nikolai Orlov in July 2003 within Phong Nha – Ke Bang National Park, Quang Binh Province, Vietnam. 
DiagnosisDiagnosis: A small, slender Cyrtodactylus with a maximum SVL of 75.3 mm, distinguished from all congeners by the combination of the following characters: 1) dorsal pattern consisting of dark nuchal band and 4–5 sometimes irregular shaped dark transversal bands between limbs; 2) dorsal tubercles present on the back of head, body, hind limbs and tail base; 3) ventrals in 34–40 longitudinal rows at midbody; 4) lateral folds absent; 5) continuous series of 20–28 precloacal and femoral pores in males; 6) enlarged femoral scales present; 7) enlarged precloacal scales present; 8) precloacal groove absent; 9) 5–8 postcloacal spurs in both sexes; 10) subcaudal scales transversally enlarged; 11) fourth toe with 17–21 subdigital lamellae. 
Comment 
EtymologyNamed after German herpetologist, and a friend and colleague of the authors, Herbert Rösler, to honour his long-term engagement in breeding and studying geckonid lizards. Herbert Rösler published several books dealing with geckos and is specialized in geckonid morphology and taxonomy, which resulted among others in the description of diverse new gecko species. 
References
  • Beolens, Bo; Michael Watkins, and Michael Grayson 2011. The Eponym Dictionary of Reptiles. Johns Hopkins University Press, Baltimore, USA - get paper here
  • DAVID, PATRICK; TRUONG QUANG NGUYEN, NICOLE SCHNEIDER & THOMAS ZIEGLER 2011. A new species of the genus Cyrtodactylus Gray, 1827 from central Laos (Squamata: Gekkonidae). Zootaxa 2833: 29–40 - get paper here
  • LOOS, JACQUELINE;, HENRIK VON WEHRDEN,, KIEN NGOC DANG , AND THOMAS ZIEGLER 2012. NICHE SEGREGATION IN MICROHABITAT USE OF THREE SYMPATRIC CYRTODACTYLUS IN THE PHONG NHA-KE BANG NATIONAL PARK, CENTRAL VIETNAM. Herp. Cons. Biol. 7 (1):101−108 - get paper here
  • 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, HUY QUANG DO, THOMAS ZIEGLER, 2011. A new Cyrtodactylus (Squamata: Gekkonidae) from Huong Son limestone forest, Hanoi, northern Vietnam. Zootaxa 3129: 39–50 - 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
  • LUU, VINH QUANG;THOMAS CALAME, MICHAEL BONKOWSKI, TRUONG QUANG NGUYEN & THOMAS ZIEGLER 2014. A new species of Cyrtodactylus (Squamata: Gekkonidae) from Khammouane Province, Laos. Zootaxa 3760 (1): 054–066 - get paper here
  • NAZAROV, ROMAN; NIKOLAY A. POYARKOV, NIKOLAI L. ORLOV, TRUNG MY PHUNG, TAO THIEN NGUYEN, DUC MINH HOANG & THOMAS ZIEGLER 2012. Two new cryptic species of the Cyrtodactylus irregularis complex (Squamata: Gekkonidae) from southern Vietnam. Zootaxa 3302: 1–24 - get paper here
  • NGO VAN TRI & OLIVIER S. G. PAUWELS 2010. A new cave-dwelling species of Cyrtodactylus Gray, 1827 (Squamata: Gekkonidae) from Khammouane Province, southern Laos. Zootaxa 2730: 44–5 - get paper here
  • PHUNG, TRUNG MY; MONA VAN SCHINGEN,, THOMAS ZIEGLER, & TRUONG QUANG NGUYEN 2014. A third new Cyrtodactylus (Squamata: Gekkonidae) from Ba Den Mountain, Tay Ninh Province, southern Vietnam. Zootaxa 3764 (3): 347–363 - get paper here
  • Rösler, H. 2018. Haftbar -- Die einzigartige Welt der Geckos. Begleitheft zur Ausstellung im Naturkundemuseum Erfurt Mai-Aug 2018, 96 pp.
  • 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
  • Ziegler, T.; ROMAN NAZAROV, NIKOLAI ORLOV, TRUONG QUANG NGUYEN, THANH NGOC VU, KIEN NGOC DANG, TRI HUY DINH, ANDREAS SCHMITZ 2010. A third new Cyrtodactylus (Squamata: Gekkonidae) from Phong Nha-Ke Bang National Park, Truong Son Range, Vietnam. Zootaxa 2413: 20–36 - get paper here
  • Ziegler, T.; TRUNG MY PHUNG, MINH DUC LE, Truong QUang Nguyen 2013. A new Cyrtodactylus (Squamata: Gekkonidae) from Phu Yen Province, southern Vietnam. Zootaxa 3686 (4): 432–446 - 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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