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1996. The evolution of locomotor morphology in Rhoptropus (Squamata: Gekkonidae): Functional and phylogenetic considerations. African Journal of Herpetology 45 (1) 8-30
… differences in the scaling relationships among the five Namibian species of the genus Rhoptropus. R. afer differs from all other taxa in y-intercept and size of ordinate variable at … reflecting functional constraint imposed by the hyperextensive scansorial system of the toes. Rhoptropus afer also typically has one fewer presacral vertebra than its congeners. There is no evidence that these features of R. afer are shared by its sister taxon, R. bradfieldi. It therefore seems likely that R. afer has evolved these locomotor characteristics, …
Website link:http://dx.doi.org/10.1080/21564574.1996.9649959
1996. Phylogenetic systematics of the day geckos, genus, Rhoptropus (Reptilia: Gekkonidae), of south-western Africa. Journal of Zoology 238 (4) 635-663
… The genus Rhoptropus consists of six species of diurnal, chiefly rupicolous, geckos that are endemic to … analysed cladistically yield a single most parsimonious pattern of relationships: ((R. afer, R. bradfieldi) (R. taeniostictus (R. boultoni (R. barnardi, R. biporosus)))). Support for the … of the Namib Desert and movement of the Namib sands. Rates of evolution among the lineages of Rhoptropus appear to be unequal and R. afer, a species largely restricted to horizontal sheet …
2016. Ecological niche separation of two sympatric insectivorous lizard species in the Namib Desert. Journal of Arid Environments
124 225-232
… Namib Desert, the Husab sand lizard, Pedioplanis husabensis, and Bradfield's Namib day gecko, Rhoptropus bradfieldi. Pedioplanis husabensis and R. bradfieldi had similar snout-vent lengths (49-52 mm), … same habitat, these two lizard species do not occupy the same ecological niche space. Keywords: Rhoptropus, Pedioplanis, Namib desert, Niche partitioning, Thermal biology. … Journal of Arid …