Abstract: It has been recognized that South China is one of important distribution areas of the Macropetalichthyidae. Since close relatives of the Macropetalichthyidae were exclusively discovered in the Middle Paleozoic strata of South China and Ningxia, the study of early macropetalichthyids from China is key to the research on the origin and evolution of the Macropetalichthyidae. In the present paper, a new genus and species of the Macropetalichthyidae, Holopetalichthys longhuaensis, is described from the Early Devonian of Longhua Hill, Qujing, Yunnan. The fish— bearing bed lies in the top of the Xujiadlong Formation, overlain by the Chuandong Formation. Zhu et al. (1994) suggested that the age of the Xujiachong Formation was Late Pragian to Early Emsian.

摘要： 描述了采自云南曲靖龙华山下泥盆统徐家冲组顶部的一件大瓣鱼科化石，定名为龙华全瓣鱼(Holopetalichthvs longhuaensis gen. et sp. nov.)。对新属种与其它瓣甲鱼类的比较表明全瓣鱼是最原始的大瓣鱼类，它与其余的大瓣鱼类构成姊妹群。通过对大瓣鱼科的历史动物地理学研究认为，瓣甲鱼目起源于华南，而大瓣鱼科的祖先几乎是广布的。大瓣鱼科隔离分化模式显示，在泥盆纪期间，华南区与东冈瓦纳区有较密切的联系。