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Gehyra crypta KEALLEY, DOUGHTY, PEPPER, KEOGH, HILLYER & HUEY, 2018

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Higher TaxaGekkonidae, Gekkota, Sauria, Squamata (lizards: geckos) 
Subspecies 
Common NamesE: Western Cryptic Gehyra 
SynonymGehyra crypta KEALLEY, DOUGHTY, PEPPER, KEOGH, HILLYER & HUEY 2018
Gehyra variegata B3 — ASHMAN et al. 2018 
DistributionAustralia (Western Australia)

Type locality: Upper Marillana Creek (2241′S, 11857′E), WA  
Reproduction 
TypesHolotype: WAM R156482, an adult male collected on 15 April 2005 by M. Ladyman and colleagues. Paratypes. WAM R111672 (male), one km north–north-west of Mount Bruce (2234′59′′S, 11827′25′′E); WAM R117152 (female), Dead Horse Rocks, 6.5 km north of Menzies (2922′S, 12117′E); WAM R151160 (female), Tom Price (2229′22′′S, 11741′29′′E); WAM R157121 (female), West Angelas (2311′57′′S, 11850′49′′E); WAM R165142 (male), 2.1 km north–north-east of Millstream (2134′38′′S, 11703′44′′E). 
DiagnosisDiagnosis. A moderately sized (to 56.5 mm SVL) species with moderately short snout, internarial usually (80%) present, lower and upper postnasals of similar size, two pairs of chin shields, second or third infralabial notched by parinfralabial scales, usually six
or seven (rarely eight) subdigital lamellae on the fourth toe and males with 10–16 (mean 12.4) pre-cloacal pores. In preservative, light grey to dark brown with highly variable pattern: from isolated dark and pale bars to dark network with white spots to patternless, head stripes present but with lower post-orbital stripe at most a spot and ventrum moderately to heavily stippled. Genetically diagnosed from other arid clade members (except G. ocellata sp. nov.) by the ND2 sites in Table 3.

Comparisons with other species. G. crypta sp. nov. is one of the most difficult species to diagnose from others in the group. The range of variation in characters and patterns overlaps with several other species, making identification particularly difficult where more than one species occurs in the same area. However, some species can be eliminated through a combination of characters.
Based on the dorsal and ventral patterning, G. crypta sp. nov. either possesses a dark network, isolated dark and pale bars or a plain greyish-brown dorsum which distinguishes it from G. pilbara, G. capensis sp. nov. and G. ocellata sp. nov., as these species have pinkish to reddish colouration. It also has moderate to dense stippling on the ventrum, which also differs from the relatively plain ventrum of these species. As for other species, it further differs from G. pilbara by not possessing a short snout.
This species differs from G. purpurascens by possessing a smaller body size yet with more numerous pre-cloacal pores in males (10–16 vs 8–11). For the remaining species, G. variegata, G. montium and G. incognita sp. nov. possess well-defined head stripes, whereas G. crypta sp. nov. has no lower post-orbital stripe or only a spot. In addition, G. variegata and G. montium have up to three pairs of chin shields, therefore if a specimen has three chin shields, this would rule out them belonging to G. crypta sp. nov. However, these characters are somewhat variable, and so using morphology alone may result in only narrowing down the identification to one of several similar-looking species.
We surmise that juveniles in areas of overlap among species will be nearly impossible to identify confidently with morphology alone. For all such individuals we recommend taking a tissue sample and obtaining diagnostic sequences (Table 3 in Kealley et al. 2018). 
CommentDistribution: see map in Kealley et al. 2018: 4 (Fig. 1). 
EtymologyThe species epithet is derived from the Greek kruptos, meaning ‘hidden.’ The name alludes to this species similarity to other species in the arid clade of the G. variegata group. Used as an adjective. 
References
  • Ashman, L. G., Bragg, J. G., Doughty, P. , Hutchinson, M. N., Bank, S. , Matzke, N. J., Oliver, P. and Moritz, C. 2018. Diversification across biomes in a continental lizard radiation. Evolution, doi:10.1111/evo.13541 - 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
  • Kealley, Luke; Paul Doughty, Mitzy Pepper, J. Scott Keogh, Mia Hillyer and Joel Huey 2018. Conspicuously concealed: revision of the arid clade of the Gehyra variegata (Gekkonidae) group in Western Australia using an integrative molecular and morphological approach, with the description of five cryptic species. PeerJ 6:e5334; DOI 10.7717/peerj.5334 - get paper here
 
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