Cyrtodactylus thylacodactylus MURDOCH, GRISMER, WOOD, NEANG, POYARKOV, TRI, NAZAROV, AOWPHOL, PAUWELS, NGUYEN & GRISMER, 2019
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Cyrtodactylus thylacodactylus
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| Higher Taxa | Gekkonidae, Gekkota, Sauria, Squamata (lizards: geckos) |
| Subspecies | |
| Common Names | E: Phnom Dalai, Pocket-fingered, Bent-toed Gecko |
| Synonym | Cyrtodactylus thylacodactylus MURDOCH, GRISMER, WOOD, NEANG, POYARKOV, TRI, NAZAROV, AOWPHOL, PAUWELS, NGUYEN & GRISMER 2019: 38 Cyrtodactylus intermedius — DALTRY & CHHEANG in DALTRY & MOMBERG 2000: 107 Cyrtodactylus intermedius — NEANG et al. 2010: 137 |
| Distribution | Cambodia (Pursat: Samkos Wildlife Sanctuary) Type locality: Camp 1, Phnom Dalai, Pursat Province, Cambodia (1225’23”N, 10304’07”E, 556 m in elevation). |
| Reproduction | |
| Types | Holotype: LSUHC 9319, adult male, collected on 6 July 2009 by Neang Thy, L. Lee Grismer, Chan Kin Onn, Jesse L. Grismer, Perry L. Wood Jr., and Timothy M. Youmans. Paratypes. Juvenile male LSUHC 9318 bears the same collection data as the holotype; adult females LSUHC 9326, 9336 and juvenile female LSUHC 9325 were collected on 7 July 2009, by the same collectors at camp 2, Phnom Dalai, Pursat Province, Cambodia (1226’13”N, 10303’21”E, 968 m in elevation). Juvenile female 9349 was collected from camp 2 by the same collectors on 8 July 2009. |
| Diagnosis | Diagnosis. Adult males reaching 71.5 mm SVL, adult females reaching 74.6 mm SVL; seven supralabials, 8– 10 infralabials; 29–31 paravertebral tubercles; 18–20 longitudinal rows of dorsal tubercles; 36–42 rows of ventral scales; five or six expanded subdigital lamellae proximal to the digital inflection, 10–11 unmodified, distal, subdigital lamellae; 15–18 total subdigital lamellae on fourth toe; enlarged femoral and precloacal continuous; 17– 22 enlarged femoral scales; proximal femoral scales the same size as distal femorals; 7–9 enlarged precloacal scales with pores on each in males; three rows of enlarged post-precloacal scales; 1–3 postcloacal tubercles; deep interdigital pocketing on either side of digit III on forefoot; deep interdigital pocketing present between third and fourth digits of hind feet; dark pigmented blotches absent from top of head; posterior border of nuchal loop rounded; and four or five dark body bands (summarized in Tables 7 + 12 in Murdoch et al. 2019). Comparisons. Cyrtodactylus thylacodactylus sp. nov. is a member of the western group and the sister species to the clade comprised of C. intermedius complex incertae sedis 1 and C. cardamomensis sp. nov. from which it is separated by 3.7%–5.0% sequence divergence (Table 4 in Murdoch et al. 2019). The PCA and DAPC plots Cyrtodactylus thylacodactylus sp. nov. as widely separated in morphospace from all other species within the complex (Figs. 6, 7). Cyrtodactylus thylacodactylus sp. nov. is well-differentiated from all other members of the C. intermedius complex, by having varying combinations of statistically different mean values of supralabial and infralabial scales, paravertebral tubercles, longitudinal rows of tubercles, ventral scales, unmodified, expanded, and total number of subdigital lamellae, enlarged femoral scales, precloacal scales, and postcloacal tubercles (Table 6). It differs from C. auralensis sp. nov. in lacking dark pigmented blotches on the top of the head. It is separated from C. bokorensis sp. nov. in having a rounded posterior border of the nuchal loop as opposed to it being pointed. Continuous contact between the precloacal and femoral scales differentiates it from C. laangensis sp. nov. and some individuals of C. bokorensis sp. nov. in which contact is variable. It is separated from all other members of the C. intermedius complex, with the exception of C. cardamomensis sp. nov. in having proximal femoral scales approximately the same size as the distal scales as opposed to being less than half the size of the distal scales. It is further distinguished from all other members of the C. intermedius complex in having deep interdigital pocketing between some of the digits of the front and rear feet (Table 7). |
| Comment | HAbitat: evergreen hill forest in the vicinity of rocky streams. All specimens were collected at night at the base of trees and on leaves and branches 1–1.5 m above the ground. Lizards were most commonly seen at the higher elevations of Camp 11. |
| Etymology | The specific epithet, thylacodactylus, is a Latinized adjective in masculine gender, derived from Greek thylakos meaning “pouch”, and daktylos meaning “digit” in reference to the unique morphology of the new species having deep interdigital pocketing between some of the digits. |
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