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Higher TaxaGekkonidae, Gekkota, Sauria, Squamata (lizards: geckos)
Common NamesE: Ross’ Calayan Gecko 
SynonymGekko rossi BROWN, OLIVEROS, SILER & DIESMOS 2009
Gekko monarchus — STEJNEGER 1907
Gekko (Archipelagekko) rossi — WOOD et al. 2019
Gekko (Archipelagekko) rossi — WOOD et al. 2020 
DistributionPhilippines (Calayan)

Type locality: m from the ground on the trunk of a large (1.2 mdbh) tree by RMB at an area known locally as ‘‘Macarra,’’ Barangay Magsidel, Municipality of Calayan, Cagayan Province, Calayan Island, Philippines (19.294°N, 121.409°E; 245 m elevation).  
TypesHolotype: PNM 9543 (Field number RMB 5998; formerly KU 304877), an adult male collected at 2245 h 2 on 15 March 2006. 
DiagnosisDiagnosis. Gekko rossi differs from all other species of Philippine Gekko (i.e., G. athymus, G. crombota, G. ernstkelleri, G. gecko, G. gigante, G. mindorensis, G. monarchus, G. palawanensis, G. porosus, and G. romblon) by the following combination of characters (1) larger body size (SVL 95.5–108.2 mm for adult males; 86.8–100.0 for females); (2) dorsum brown with six diffuse transverse black bars adjacent to six transverse series of two or three cream spots; (3) high numbers of dorsal body scales (125–170 transverse midbody scales; 251–281 paravertebrals); (4) high number of sharply conical dorsal body tubercle rows (16–18 midbody; 31–37 paravertebrally); (5) 77–88 enlarged precloacal-femorals arranged in a continuous, uninterrupted series (pore bearing in males; lacking pores in females). 
CommentAbundance: only known from its original description (Meiri et al. 2017). 
EtymologyNamed for Charles Andrew Ross in recognition of his numerous contributions to the systematics of reptiles and amphibians of the Philippines and his particular enthusiasm for the herpetofauna of the Babuyan islands. 
  • Brown, R.M.; Oliveros, C.; Siler, C.D. & Diesmos, A.C. 2009. Phylogeny of Gekko from the Northern Philippines, and Description of a New Species from Calayan Island. Journal of Herpetology 43 (4): 620–635 - get paper here
  • Brown, Rafe M.; Cameron D. Siler, Carl H. Oliveros, Arvin C. Diesmos, and Angel C. Alcala 2011. A New Gekko from Sibuyan Island, Central Philippines. Herpetologica 67 (4): 460-476. - get paper here
  • Meiri, Shai; Aaron M. Bauer, Allen Allison, Fernando Castro-Herrera, Laurent Chirio, Guarino Colli, Indraneil Das, Tiffany M. Doan, Frank Glaw, Lee L. Grismer, Marinus Hoogmoed, Fred Kraus, Matthew LeBreton, Danny Meirte, Zoltán T. Nagy, Cristiano d 2017. Extinct, obscure or imaginary: the lizard species with the smallest ranges. Diversity and Distributions - get paper here
  • Oaks, J. R., Siler, C. D. and Brown, R. M. 2019. The comparative biogeography of Philippine geckos challenges predictions from a paradigm of climate‐driven vicariant diversification across an island archipelago. Evolution doi:10.1111/evo.13754 - get paper here
  • Stejneger, L. 1907. A new geckoid lizard from the Philippine Islands. Proc. US Natl. Mus. 33: 545-546 [1908] - get paper here
  • Wood Jr, Perry L.; Xianguang Guo, Scott L. Travers, Yong-Chao Su, Karen V. Olson, Aaron M. Bauer, L. Lee Grismer, Cameron D. Siler, Robert G. Moyle, Michael J. Andersen, Rafe M. Brown 2019. Parachute geckos free fall into synonymy: Gekko phylogeny, and a new subgeneric classification, inferred from thousands of ultraconserved elements. bioRxiv 717520 [preprint] - get paper here
  • Wood, P. L., Guo, X., Travers, S. L., Su, Y. C., Olson, K. V., Bauer, A. M., Grismer, L. L., Siler, C. D., Moyle, R. G., Andersen, M. J. and Brown, R. M. 2020. Parachute geckos free fall into synonymy: Gekko phylogeny, and a new subgeneric classification, inferred from thousands of ultraconserved elements. Molecular Phylogenetics and Evolution 146: 106731 [corrigendum: MPE 164: 107255] - get paper here
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