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Cyrtodactylus nicobaricus CHANDRAMOULI, 2020

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Higher TaxaGekkonidae, Gekkota, Sauria, Squamata (lizards: geckos)
Common Names 
SynonymCyrtodactylus nicobaricus CHANDRAMOULI 2020: 80
Cyrtodactylus rubidus – BISWAS & SANYAL 1984: 477 (nec BLYTH 1861)
Cyrtodactylus adleri – HARIKRISHNAN & VASUDEVAN 2018 (nec DAS 1997) 
DistributionIndia (Nicobar Islands: Car Nicobar and possibly Batti Malv)

Type locality: human habitation in Chuckchucka Village (9.21° N, 92.79° E, 33.4 m elevation) in Car Nicobar Island  
TypesHolotype: ZSI/ANRC/T/ 11074, an adult male, collected by S.R. Chandramouli on 17 June 2017.
Paratopotypes: DOSMB05100, an adult female and DOSMB05101, an adult female, collected by S.R. Chandramouli from the type locality on 13 and 15 June 2017respectively. 
DiagnosisDiagnosis: A Cyrtodactylus endemic to Car Nicobar Island of the Nicobar archipelago which is diagnosed and characterized by: presence of 16–18 transverse rows of dorsal tubercles (vs. 13–15 in C. rubidus); 10 supralabials, eight–nine infralabials, two elongate inner pair of post-mentals in broad contact with each other; two smaller outer pair of post-mentals separated from each other; presence of a precloacal groove (vs. absent in C. adleri and C. camortensis sp. nov.) and upto six precloacal pores located around the precloacal groove in males; absence of femoral pores; presence of four enlarged internasals; presence of ventrolateral dermal folds; 37–40 strongly imbricate ventrals (vs. juxtaposed and non-overlapping ventrals in C. rubidus); two pairs of rounded cloacal spurs in males; 14–15 subdigital lamellae under the IV toe of which, the basal six are slightly dilated (vs. 17–19 in C. rubidus); presence of a dark nuchal loop formed by post ocular streaks extending and joining at the nape (vs. absent in C. adleri and C. camortensis sp. nov.); dorsal colour pattern of five to six dark transverse bands on a dark brown ground colour (vs. a series of vertebral spots in C. adleri and C. camortensis sp. nov.) with a series of short longitudinal bands converging posteriorly towards middorsumbetween forelimbs. 
CommentHabitat: found in forests as well as human habitation. Often observed on leaf-litter in the forest floor and branches of small shrubs up to about 1m above the ground. 
EtymologyA toponym, named after the type locality of this species, Car Nicobar Island, which is colloquially called just as ‘Nicobar’. 
  • Biswas, S. 1984. Some notes on the reptiles of the Andaman and Nicobar Islands. J. Bombay Nat. Hist. Soc. 81(2), 476-481. - get paper here
  • Biswas, S., & Sanyal, D.P. 1980. A report on the Reptilia fauna of Andaman and Nicobars Islands in the collection of Zoological Survey of India. Records Zool. Survey India 77: 255-292. - get paper here
  • Chandramouli, S. R. 2020. A review of the Gekkonid genus Cyrtodactylus Gray, 1827 (Sauria: Gekkonidae) in the Andaman and Nicobar archipelago with the description of two new species from the Nicobar Islands. Asian Journal of Conservation Biology 9 (1): 78-89 - get paper here
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