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Cyrtodactylus dattkyaikensis GRISMER, WOOD, QUAH, GRISMER, THURA, OAKS & LIN, 2020

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Higher TaxaGekkonidae, Gekkota, Sauria, Squamata (lizards: geckos)
Subspecies 
Common NamesE: Datt Kyaik Hill Bent-toed Gecko 
SynonymCyrtodactylus dattkyaikensis GRISMER, WOOD, QUAH, GRISMER, THURA, OAKS & LIN 2020 
DistributionMyanmar (Mon)

Type locality: Datt Kyaik Hill, Mon State, 23 km northwest of Hpa-an, Mon State, Myanmar (17.02854°N, 97.47071°E; 12 m in elevation  
Reproduction 
TypesHolotype. LSUHC 14201, Adult male, collected on 9 November 2018 at 2000 hrs by Evan S. H. Quah, Myint Kyaw Thura, Jamie R. Oaks, Perry L. Wood Jr., Aung Lin, and L. Lee Grismer.
Paratypes. Adult male LSUHC 14202 and adult female 14203 bear the same collection data as the holotype. 
DiagnosisDiagnosis. Cyrtodactylus dattkyaikensis sp. nov. differs from all species in the C. sinyineensis group by having the combination of eight or nine supralabials; six or seven infralabials; 33–35 paravertebral tubercles; 18–20 longitudinal rows of dorsal tubercles; 25 or 26 ventral scales; nine or 10 expanded subdigital lamellae on the fourth toe; 13 unexpanded subdigital lamellae on the fourth toe; 22 or 23 total subdigital lamellae on the fourth toe; 25–28 enlarged femoral scales; 15 pore-bearing femoral scales in males; eight or nine enlarged precloacal scales; 6–8 pore-bearing precloacal scales in males; three rows of enlarged post-precloacal scales; six dorsal body bands; 7–9 light-colored caudal bands; eight or nine dark-colored caudal bands; raised and strongly keeled dorsal tubercles that extend beyond the postcloacal swelling; enlarged femoral and precloacal scales nearly the same size and continuous; pore-bearing femoral and precloacal scales not continuous; medial subcaudals two to three times wider than long and extending onto lateral side of tail; nuchal loop divided medially, lacking an anterior azygous notch, and bearing a protracted posterior border; no band on nape; some dorsal bands bearing paravertebral elements, wider than interspaces, bearing lightened centers, partly edged with white tubercles, and zig-zag in shape; dark markings in dorsal interspaces; light-coloured caudal bands in adults bearing dark-colored markings; light-colored caudal bands not encircling tail; and mature regenerated tail not spotted (Table 6).

Comparisons (Tables 4, 6). Cyrtodactylus dattkyaikensis sp. nov. (n=3) differs from various combinations of all other species in the C. sinyineensis group (n=3–24) in having statistically different mean values across a broad number of scale characteristics (Table 4). It differs further from C. chaunghanakwaensis in having raised and more strongly keeled dorsal tubercles, discontinuous pore-bearing femoral and precloacal scales, no band on the nape, and the dorsal bands lacking paravertebral elements. It differs further from C. dammathetensis in having discontinuous pore-bearing femoral and precloacal scales, all femoral scales similarly sized, no band on the nape, and the dorsal bands lacking paravertebral elements, dorsal bands bearing lightened centers and being partly edged with light-colored tubercles, light-colored caudal bands bearing dark-colored markings, and a maximum SVL of 83.0 mm vs 69.3 mm (n=3). From C. aequalis it differs in that the median subcaudal scales extend onto the lateral side of the tail, lacking a band on the nape, body bands lacking paravertebral elements but bearing lightened centers, and no dark-colored markings in the light-colored caudal bands. From C. cf. aequalis it differs in that the median subcaudal scales do not extend onto the lateral side of the tail and the light-colored caudal bands do not encircle the tail. From C. sinyineensis it differs in that the median subcaudal scales do not extend onto the lateral side of the tail and by lacking a band on the nape. It differs from C. welpyanensis in that the median subcaudal scales extend onto the lateral side of the tail and by lacking a band on the nape, having dorsal bands with lightened centers and being partly edged with light-colored tubercles, and not having a whitish ventrolateral fold. It differs from C. bayinnyiensis by lacking a band on the nape, having dorsal body bands partly edged with light-colored tubercles, the light-colored caudal bands bearing dark-colored markings, and the mature regenerated tail not spotted. From C. naungnkayaingensis it differs in that the dorsal bands lack paravertebral elements, are partly edged with light-colored tubercles, wider than the interspaces, and the maximum SVL length being 83.0 mm vs 66.9 mm (n=24). From C. taungwineensis, it differs in that the nuchal loop is divided. 
Comment 
EtymologyThe specific epithet, dattkyaikensis is a noun in apposition in reference to the type locality of Datt Kyaik Hill. 
References
  • GRISMER, L. LEE; PERRY L. WOOD, JR., EVAN S.H. QUAH, MARTA S. GRISMER, MYINT KYAW<br />THURA, JAMIE R. OAKS & AUNG LIN 2020. Two new species of Cyrtodactylus Gray, 1827 (Squamata: Gekkonidae) from a karstic archipelago in the Salween Basin of southern Myanmar (Burma). Zootaxa 4718 (2): 151–183 - get paper here
 
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