Abstract: A new species of the Arthrodira, Livosteus sinensis sp. nov., is described from the Jiucheng Formation (Emsian, Lower Devonian) of Wuding, Yunnan. Livosteus was originally found in Latvia. Its discovery in the Jiucheng Formation represents the second occurrence of the genus in the world, and provides a basis for comparing continental formations and for studying paleogeography, since these two localities arc far away from each other.

摘要： 详细记述了发现于云南武定早泥盆叶晚期利沃鱼(Livosteus)的新材料。依据其特征，建立一个新种。这是该属除在拉脱维亚以外在世界上的第二个种，因此具有重要的古生物地理意义。