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Lepidodactylus dialeukos KRAUS, 2019

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Higher TaxaGekkonidae, Gekkota, Sauria, Squamata (lizards: geckos) 
Subspecies 
Common Names 
SynonymLepidodactylus dialeukos KRAUS 2019 
DistributionIndonesia (Yapen Island, Papua Province)

Type locality: Mt. Baduri, 1.75°S, 136.25°E, 1000 ft [305 m], Yapen Island, Papua Province, Indonesia  
Reproduction 
TypesHolotype. BMNH 1974.3028, mature female, collected by L.E. Cheesman, March–April 1938. 
DiagnosisDiagnosis. A medium-sized species (adult SVL 46.5 mm) species of Lepidodactylus having a subcylindrical tail without a lateral fringe of enlarged scales; one divided subterminal scansor on digits; 14 enlarged scales of the pore-bearing series limited to precloacal region; 9–10 T4 lamellae, 8–9 T1 lamellae; toes relatively long (T4/SVL = 0.12) and wide (T4W/T4L = 0.36), poorly webbed (T3T4webL/T4L = 0.20), with lamellae covering only about half their length (T4lamellaeL/4TL = 0.53); nine small precloacal scales between apex of pore-bearing series and cloaca; dorsum uniformly gray with a row of dorsolateral white spots on each side, lacking dark spots in this region; white postocular stripe; narrow bands or patches of white scales on dorsal surfaces of forearms, wrists, shanks, ankles, and digits; and black punctations widely scattered ventrally.

Comparisons with other species. The subcylindrical tail without a lateral fringe of enlarged scales and the single divided subterminal scansors under the toes place Lepidodactylus dialeukos sp. nov. in Brown and Parker’s (1977) Group II. Lepidodactylus dialeukos sp. nov. differs from all other Melanesian members of this group in being the only species with only a single divided subterminal scansor (versus having 2–4 in the other species) and extensive white markings. It further differs from other Melanesian members of this group as follows: from L. guppyi, L. pulcher, and L. shebae in having fewer enlarged precloacal scales (14 versus 39–52, 18–20, and 34, respectively, in the other species), and further from L. shebae in its larger adult size (SVL 46.5 mm versus ~36 mm in L. shebae). It differs from L. novaeguineae in having less coverage of the fourth toe by lamellae (T4lamellaeL/4TL = 0.53 versus 0.65–0.94 in L. novaeguineae), a longer fourth toe (T4/SVL = 0.12 versus 0.086–0.11 in L. novaeguineae), a white postocular stripe (absent in L. novaeguineae), dorsum with a dorsolateral row of white spots (absent in L. novaeguineae), and bands or patches of white scales on dorsal surfaces of digits (absent in L. novaeguineae). It dif- fers from L. mitchelli sp. nov. in its larger adult size (SVL = 46.5 mm versus mean 40.3, range = 35–45.5 mm in L. mitchelli sp. nov.), white postocular stripe (absent in L. mitchelli sp. nov.), dorsum with a dorsolateral row of white spots (absent in L. mitchelli sp. nov.), and bands or patches of white scales on dorsal surfaces of digits (absent in L. mitchelli sp. nov.). It differs from L. kwasnickae sp. nov. in having fewer T4 lamellae (10 versus 12–20 in L. kwas- nickae sp. nov.), dorsum uniform gray (boldly patterned with brown in L. kwasnickae sp. nov.), bands or patches of white scales on dorsal surfaces of digits (absent in L. kwasnickae sp. nov.), and black punctations widely scattered ventrally (many posteroventral and plantar scales uniformly brown in L. kwasnickae sp. nov.). 
Comment 
EtymologyThe name is a masculine possessive Greek adjective meaning marked with white. The name is in reference to the numerous narrow white markings that typify this species 
References
  • Kraus, Fred 2019. New species of Lepidodactylus (Squamata: Gekkonidae) from New Guinea and adjacent islands. Zootaxa 4651 (2): 305–329 - get paper here
 
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