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Pachydactylus visseri BAUER, LAMB & BRANCH, 2006

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Higher TaxaGekkonidae, Gekkota, Sauria, Squamata (lizards: geckos) 
Subspecies 
Common Names 
SynonymPachydactylus visseri BAUER, LAMB & BRANCH 2006: 676
Pachydactylus weberi — BRANCH 1998: 263
Pachydactylus visseri — MASHININI & MAHLANGU 2013 
DistributionRepublic of South Africa (Northern Cape province), Namibia (Lüderitz, Karasburg Districts).

Type locality: Namibia, Karas Region, Karasburg District, Ai-Ais Nature Reserve, c. 3 km N Orange River (28°12′26′′S, 17°16′43′′E). Map legend:
TDWG region - Region according to the TDWG standard, not a precise distribution map.

NOTE: TDWG regions are generated automatically from the text in the distribution field and not in every cases it works well. We are working on it.
 
Reproductionoviparous 
TypesHolotype: CAS 201874 (Fig. 108): Adult male; coll. A.M. Bauer, 26 June 1996. PARATYPES: TM, NMNW 
CommentDIAGNOSIS.—Arelatively large species, to 48.5 mm SVL(PEM R 4638). Pachydactylus visseri may be distinguished from all other members of the P. serval/weberigroup by the combination of the following characters: nasal region not inflated; rostral excluded from nostril; supranasals in broad or narrow contact; scales on snout and canthus granular, rounded to oval, flattened to weakly domed, much larger than granular scales of interorbital and parietal regions; small, rounded, conical tubercles, much smaller than snout scales, interspersed among granules of interorbital and parietal regions; dorsal scalation heterogeneous, with moderately large (6–9 times dorsal granules), oval, distinctly keeled arranged in 16–18 regular rows, largest on midflanks; thighs bearing enlarged keeled tubercles; toes relatively short, toe pads relatively narrow; typically five undivided lamellae beneath digit IVof pes; tail to at least 120% of SVL, annulate, bearing whorls of moderately large, pointed, weakly to strongly keeled tubercles; adult pattern a series of distinct, wide, pale (cream to beige) transverse bands separated by thinner dark brown bands. Six bands (rarely seven) anterior to sacrum (one on nape, one across shoulders, four evenly spaced between axilla and hindlimb insertion); tail with strongly contrasting cream and dark brown bands of approximately equal width (Figs. 109–110 in Bauer et al. 2006). Juvenile pattern similar to adult (Fig. 111 in Bauer et al. 2006).

Distribution: see map in BRANCH et al. 2011. 
EtymologyETYMOLOGY.—The specific epithet is a patronym honoring John D. Visser (21 May 1938 - 15 May 2012), an important contributor to southern African herpetology who kindly provided several hundred specimens from his personal collection for use in this study. The name is constructed in the masculine genitive. The epithet also reflects the occurrence of the species in the Fish (Vis) River Valley. For an aobituary see BROADLEY & SCOTT_PRENDINI 2012. 
References
  • Barts, M. 2007. Revision zweier Artkomplexe innerhalb der südafrikanischen Dickfingergeckos. Reptilia (Münster) 12 (66): 6-9 - get paper here
  • BARTS, M. & COLACICCO, F. 2015. Die Dickfingergeckos des südlichen Afrikas Teil XVIII: Pachydactylus visseri BAUER, LAMB & BRANCH, 2006. Sauria 37 (2): 53 - 57 - get paper here
  • Bauer, Aaron M. Lamb, Trip. Branch, William R. 2006. A revision of the Pachydactylus serval and P. weberi groups (Reptilia: Gekkota: Gekkonidae) of Southern Africa, with the description of eight new species. Proc. Cal. Acad. Sci. 57 (12-24):595-709.
  • Branch, W. R. 1998. Field Guide to the Snakes and Other Reptiles of Southern Africa. Fully Revised and Updated to Include 83 New Species. Ralph Curtis Books (Sanibel Island, Florida), 399 pp.
  • Branch, William R.; Aaron M. Bauer, Todd R. Jackman, and Matthew Heinicke 2011. A New Species of the Pachydactylus weberi Complex (Reptilia: Squamata: Gekkonidae) from the Namibrand Reserve, Southern Namibia. Breviora (524): 1-15. - get paper here
  • Broadley, D.G. & Scott-Prendini, E. 2012. OBITUARY: JOHN DUCKITT VISSER. African Herp News (57): 4-8
  • Herrmann, H.-W.; W.R. Branch 2013. Fifty years of herpetological research in the Namib Desert and Namibia with an updated and annotated species checklist. Journal of Arid Environments 93: 94–115 - get paper here
 
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