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Dierogekko validiclavis (SADLIER, 1988)

IUCN Red List - Dierogekko validiclavis - Endangered, EN

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Higher TaxaDiplodactylidae, Gekkota, Sauria, Squamata (lizards: geckos) 
Subspecies 
Common NamesKey New Caledonian Gecko 
SynonymBavayia validiclavis SADLIER 1988
Bavayia validiclavis — RÖSLER 2000: 61
Dierogekko validiclavis — BAUER et al. 2006
Dierogekko validiclavis — BAUER et al. 2012 
DistributionNew Caledonia (regions of Mt. Panié and Mt. Mandjélia)

Type locality: Mt. Panié (500–600 m elevation), Province Nord, New Caledonia, 20°33′S, 164°45′E [published coordinates], 20°33′43′′S, 164°46′50′′E [corrected coordinates].  
Reproductionoviparous 
TypesHolotype: AMS R77855, collected by R.A. Sadlier and P.R. Rankin, 17 December 1978. 
DiagnosisDIAGNOSIS (genus): Dierogekko may be distinguished from all other New Caledonian diplodactylid geckos by the following combination of character states: body size very small (< 46 mm SVL); head small; tail 92–120% of SVL; dorsal scalation granular, homogeneous; body without extensive skin webs or flaps; expanded subdigital lamellae under all toes; lamellae under penultimate phalanx of digits II–V of manus and pes paired or single; claw of digit I of manus and pes in a groove in the apical lamella between a larger medial scansor and a smaller lateral scansor; precloacal pores in one or two rows in males (10–20 pores in total), not extending onto thighs; dorsal pattern of longitudinal lines or series of spots or patternless, never with transverse markings; venter usually cream to light brown, sometimes pale yellow (BAUER et al. 2012).

Members of the genus Dierogekko superficially resemble members of the genera Bavayia and Oedodera, all of which are relatively small and predominantly brown in color. They differ from the recently described Oedodera(Bauer et al. 2006) in possessing divided distal subdigital lamellae (except D. poumensis) and in lacking a swollen neck and medial apical scansors on digit II of the pes. Dierogekkospp. may be distinguished from Bavayia sauvagii, B. ornata, and B. madjoby the position of the claw of digit I of manus and pes (in a groove between medial and lateral portions of a cleft apical scansor vs. lateral to a single medial apical scansor), from B. cyclura, B. montana, B. crassicollis, B. robusta, B. geitaina, andB. exsuccidaby the absence of transverse dorsal markings and by much smaller body size (< 50 mm vs. > 72 mm max. SVL) in all but the last of these species, and from B. pulchellaand B. septuiclavisin having the entire dorsal surface lighter than the flanks and demarcated by a series of narrow, continuous or broken stripes (vs. a narrow pale vertebral stripe and/or no white border stripe) (BAUER et al. 2006).

Diagnosis (genus): Digits with paired terminal scansors that lack lamellae, reduction of phalangeal formula of manus to 2.3.4.4.3, no transverse processes on autotomic caudal vertebrae except sometimes the first (ARNOLD 1977), no femoral pores, cloacal sacs or bones, only one egg laid at a time and left oviduct absent. The left oviduct is present in Phyllodactylus and in the apparently related Paroedura [ARNOLD & GARDNER 1994]. 
CommentAbundance: uncommon

Type species: Bavayia validiclavis SADLIER 1988 is the type species of the genus Dierogekko BAUER et al. 2006. 
Etymology 
References
  • Bauer, A. M. & SADLIER, R. A. (eds.) 2000. The herpetofauna of New Caledonia. Contributions to Herpetology, 17; Society for Study Amphibians and Reptiles, Ithaca, New York.
  • Bauer, Aaron M. Jackman, Todd. Sadlier, Ross A. Whitaker, Anthony H. 2006. A revision of the Bavayia validiclavis group (Squamata: Gekkota: Diplodactylidae), a clade of New Caledonian geckos exhibiting microendemism. Proc. Cal. Acad. Sci. 57 (12-24):503-547. - get paper here
  • Bauer,A.M. & Sadlier,R.A. 1993. Systematics, biogeography and conservation of the lizards of New Caledonia. Biodiv. Lett. 1: 107-122
  • Rösler, H. 2000. Kommentierte Liste der rezent, subrezent und fossil bekannten Geckotaxa (Reptilia: Gekkonomorpha). Gekkota 2: 28-153
  • Sadlier,R.A. 1988. Bavayia septuiclavis and Bavayia validiclavis, two new species of gekkonid lizard from New Caledonia. Rec. Austral. Mus. 40: 365-370 - get paper here
  • SKIPWITH, Phillip; Todd JACKMAN, Anthony H. WHITAKER, Aaron M. BAUER & Ross A. SADLIER 2014. New data on Dierogekko (Squamata: Gekkota: Diplodactylidae), with the description of a new species from Ile Baaba, Province Nord, New Caledonia. Memoires du Museum National d'Histoire Naturelle, 206: 13-30. - get paper here
  • Watkins-Colwell, Gregory J. 2002. Gecko Hunting in New Caledonia. Gekko 3 (2): 2-8
 
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