Abstract: The actinopterygian specimens described here were collected from Weixin, Yunnan by the Regional Geological Surveying Brigade of Guizhou Province. It was alleged that all the 25 specimens were discovered from "Xiangxi Formation" (Lower Jurassic). Four of them are assigned to a new genus and species, Weixiniscus microlepis, of the Palaeoniscidae. The others are referred to a new genus and species, Zaxilepis qinglongensis, of the Archaeomaenidae. Previously archaeomaenids were known only from Australia and Antarctica of Gondwanaland, this new discovery is of significance in the understanding of the distribution of Mesozoic freshwater fishes.