滇西早泥盆世大瓣鱼科(Macropetalichthyidae)化石的发现

<正> 泥盆纪的大瓣鱼化石目前除在南美和非洲尚未发现外,在全球其他各洲分布甚为广泛.它的分布时代可由早泥盆世延续到晚泥盆世.据统计目前发现的该科化石已达12个属.我国目前发现的大瓣鱼科化石共有5个属种,分布于华南的下、中泥盆统,主要发现于下泥盆统.

DISCOVERY OF MACROPETALICHTHYIDAE FROM LOWER DEVONIAN IN WESTERN YUNNAN

An incomplete external mould of head shield fossil of Macropetalichthyidae was discovered from the lower part of the Guanshang Fm., Lower Devonian of the Shizishan Section in the Guanshang, Yingjiang County, Western Yunnan. The specimen is preserved in the impure sandstone with quartzose conglomerate. The fish-bearing bed is about 10.7 m in thickness and the fish fossil is associated with some invertebrate fossils. This fossil fish is similar to Wijdeaspis collected from Lower Devonian of North Europe, particularly the characters of the preorbital plates and its ornamentation. So it is referred to Macropetalichthyidae. Because of only one specimen available, it is reported as an indeterminate genus and species in this paper.