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Gehyra paranana BOURKE, DOUGHTY, TEDESCHI, OLIVER & MORITZ, 2018

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Higher TaxaGekkonidae, Gekkota, Sauria, Squamata (lizards: geckos) 
Subspecies 
Common NamesLitchfield spotted gecko 
SynonymGehyra paranana BOURKE, DOUGHTY, TEDESCHI, OLIVER & MORITZ in DOUGHTY et al. 2018: 215 
DistributionAustralia (Northern Territory)

Type locality: Dorat Road, Robin Falls area, Northern Territory (13.35278°S; 131.13361°E), Australia.  
Reproduction 
TypesHolotype: NTM R37057, an adult female collected on 21 September 2013 by P.M. Oliver, P. Skipwith and M. Hammer.
Paratypes (12). Northern Territory: NTM R20246 (male), Butterfly Gorge, 6 km east of Daly River crossing (13.73333°S; 130.73333°E); NTM R37831 (field# CCM0651) and NTM R37832 (CCM0652) (females), Bullo River Station (15.65862°S; 129.65944°E); NTM R36578 and NTM R36579 (females), Bullo River Station (15.65766°S; 129.65933°E); NTM R36554 (male), Gurrandalng camp, Keep River National Park (15.87516°S; 129.051°E); NTM R37056 (male), Dorat Road, Robin Falls area (13.35278°S; 131.13361°E); NTM R37833 (CCM2881) (female), NTM R37834 (CCM2883) and NTM R37835 (CCM2885) (males), Tolmer Falls turnoff, Litchfield National Park (13.19654°S; 130.71394°E); NTM R37836 (CCM2936) (female) and WAM R177563 (CCM2937) (female), Florence Falls turnoff, Litchfield National Park (13.12641°S; 130.80463°E). 
DiagnosisDiagnosis. A Gehyra with moderately small body size (~50 mm, range 40–57 SVL), no flap of skin between limbs, dorsal half of rostral deeply furrowed with groove, single internasal usually present, 2 postnasals usually similar in size but if different then upper larger than lower, first supralabial slightly taller and narrower than second, 2 pairs of chin shields, first digit of manus and pes without claw, moderately flattened snout, snout straight to concave in lateral view, 7 divided subdigital lamellae on fourth toe, in adult males an average of 15 pre-cloacal pores (range 12–19) arranged in chevron pointing anteriorly. In life, moderately dark tan to brown background colour with pale and dark moderately large spots of similar size and not in contact on dorsum that tend to form transverse rows or coalescing to form short bars.

Comparisons with other species. Gehyra paranana sp. nov. resembles G. nana closely, and the same comparisons to distinguish G. nana from other Gehyra above can largely be apply to G. paranana sp. nov. With respect to G. nana, all but one specimen of G. paranana sp. nov. possessed 7 subdigital lamellae on the fourth toe, whereas G. nana usually had 5 or 6. For body size, most G. paranana sp. nov. have SVL >50 mm (maximum SVL is 56.7 mm), whereas most G. nana have SVL <50 mm; however, some G. nana from the western Top End (Mt Bundy, Edith Falls, Hayes Creek) do attain larger body size, overlapping the range of G. paranana sp. nov. The pattern of spots is also useful, as G. paranana sp. nov. has larger, less distinct, pale spots and dark markings compared to G. nana (cf. Fig. 5), with the dark markings often forming short bars or networks, especially a dark streak behind the eye (absent in G. nana).
Owing to the close morphological resemblance of the two species, confirmation of identity is possible with genetics by obtaining a tissue sample (e.g. tail tip) to generate mtDNA SNPs and consulting the diagnostic loci provided in Appendix 2. 
CommentHabitat. This species has been collected from sandstone rock formations in open woodland habitats, appearing to prefer large expanses of exposed sandstone such as large boulders and rock walls. It is sympatric with G. nana and G. koira (australis group) at northern localities. The former is a smaller-bodied species that is more commonly found on smaller boulders and amongst rock rubble, whereas G. koira is much larger and prefers boulders and vertical crevices.

Distribution: see map in Doughty et al. 2018: 203 (Fig. 1). 
EtymologyThe specific name paranana refers to the morphological similarity of this species to G. nana, as in “parallel to nana”. 
References
  • DOUGHTY, PAUL; GAYLEEN BOURKE, LEONARDO G. TEDESCHI, RENAE C. PRATT, PAUL M. OLIVER, RUSSELL A. PALMER, CRAIG MORITZ 2018. Species delimitation in the Gehyra nana (Squamata: Gekkonidae) complex: cryptic and divergent morphological evolution in the Australian Monsoonal Tropics, with the description of four new species Zootaxa 4403 (2): 201–244 - get paper here
  • Ellis, Ryan J.; Paul Doughty and Aaron M. Bauer 2018. An annotated type catalogue of the geckos and pygopods (Squamata: Gekkota: Carphodactylidae, Diplodactylidae, Gekkonidae, Pygopodidae) in the collection of the Western Australian Museum Records of the Western Australian Museum 33: 051–094 - get paper here
 
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