A complete series of vomerine teeth of pycnodontoidea has been foundfrom the vicinity of Changtu(Sikang).It represents the first record of vertebrateremains in the Tibetan highlands.Order PycnodontoideaFamily CyrodontidaeGenus Tibetodus,new genusDiagnosis as given for the type species Tibetodus gyrodoidesSpecies Tibetodus gyrodoides,new species.Material:A vomer with the teeth nearly complete.Field No.C.3340.