Hidden Biodiversity in the Tropical Rain Forests: Two New Species of <italic>Leptobrachella</italic> Smith 1925 (Anura: Megophryidae) from Vietnam

<p indent="0mm">Two new species of <italic>Leptobrachella</italic> are described from Vietnam based on morphological differences and genetic divergences in 16S rRNA mitochondrial gene sequences. The new taxa are distinguished from each other and from other species of the genus <italic>Leptobrachella</italic> in body size, head width/length ratio, tympanum morphology, dorsal skin texture, the presence/absence of fringes on toes, color of dorsal and ventral body, and iris color. The two new species are also divergent from each other and from other congeners by a 4.14% or greater uncorrected genetic distance. <italic>Leptobrachella batxatensis</italic> <bold>sp. nov.</bold> is genetically closest to <italic>L</italic>. <italic>shiwandashanensis</italic> and <italic>L</italic>. <italic>wuhuangmontis</italic> from China. <italic>Leptobrachella duyenae</italic> <bold>sp. nov.</bold> is genetically closest to <italic>L</italic>. <italic>bidoupensis</italic> from Vietnam with strong nodal support from both BI and ML analyses (1.0/99%).