Abstract
We compared morphological characters among Thai populations of Leptobrachium currently assigned to L. hasseltii or L. pullum. We also examined syntypes of the latter, which was first described from Vietnam as Megalophrys hasseltii var. pullus Smith, 1921, and designated the lectotype. The Thai populations are slightly variable in adult and larval morphology, but are collectively different from L. hasseltii (originally described from Java) or L. pullum. We therefore describe a new species, L. smithi, for those populations on the basis of the sample from Khao Chong, southern Thailand.
