A new small species of Cnemaspis, C. chanthaburiensis, is described fr
om Chanthaburi and Chon Buri Provinces, southeastern Thailand. It is t
he only Cnemaspis occurring in the region and may be distinguished fro
m congeners by its small size (maximum 41 mm SVL), smooth ventral and
subcaudal scales, 7-9 preanal pores in males, and by hyperphalangy of
digits II and V of the manus and digit II of the pes. The hyperphalang
eal condition is unique among Asian geckos.