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（Hoopetalichthyslonghuaensisgen.etsp.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 A large cichlid fossil collected from the top of the Xujiachu Formation of the Lower Devonian in Qujing, Qujing, Yunnan, is described as Hoopetalichthyslonghuaensisgen.etsp.nov. Comparisons of the new species with other petals suggest that the whole petal is the most primitive petunia and constitutes a sister group with the rest of the petunia. Based on the historical animal geography studies of the Cichlididae, it is believed that the cichlid head originated in southern China, while the ancestors of the cantaris family are almost widespread. Isolation and differentiation patterns of the cantatory division show that during the Devonian period, there was a close relationship between the South China region and the East Gwanal Wanna region