The Yunnan Caecilian(Ichthyophis bannanicus) is the Gymnophiona species found only in China.Here we report the dentition of I.bannanicus at different developmental stages.The results show that the teeth of I.bannanicus are derived from the basal layer cells of the oral epidermis.A mature tooth has two parts linked by a fibrous ring,namely pedicel and crown.The teeth are homodont and nail-like with bicuspid.Both maxilla and submaxilla of the adult individuals have two teeth rows,and one or two teeth grow from each locus.But the numbers of teeth and loci in the maxilla are usual more than those in the submaxilla.Moreover,the number of lingual series teeth is more than that of labial series teeth in the maxilla,while opposite trend is observed in the submaxilla.The number and loci of teeth increase at the posterior jaw as individual grows.Numerous teeth are found in the state of replacement or abscission in the sub-adult and adult.Meanwhile,sparse attachment of the functional teeth interlaced with unfunctional teeth change to dense and regular attachment of functional teeth.We also compare the dentition of I.bannanicus with that of other caecilians.