We describe a new genus and two new species of toads from the Sumatran volcanoes Gunung Sorikmarapi and G. Kunyit, in the provinces of Sumatera Utara and Jambi, respectively. The new taxa can be distinguished from other genera, and each other, based on genetic differentiation, morphology, and advertisement call structure. We employ both nuclear and mitochondrial data to provide a phylogenetic hypothesis of relationships for the bufonid genera of the Sunda Shelf. While broadly corroborating previous studies, our results also shed light on the phylogenetic position of Pseudobufo. The new genus, Duttaphrynus, and Pseudobufo are basal to other Sunda Shelf genera in our phylogenies.

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