We just published a new paper on the invasion of the Spiny Asian toad (Duttaphrynus melanostictus) to Madagascar. This new paper expanded sampling of toads within their native Asian range as well as those introduced in Madagascar. The expanded sampling suggests that the introduction came from Southern Vietnam or Cambodia. We also did some niche modelling to assess the potential distribution of the toad within Madagascar. Anyway, check it out!
Figure 1. from Vences et al. 2017. Tracing a toad invasion: Lack of mitochondrial DNA variation, haplotype origins, and potential distribution of introduced Duttaphrynus melanostictus in Madagascar. Amphibia-Reptilia v. 38: 197-207 DOI:10.1163/15685381-00003104