Abstract: Carboniferous fishes have been found from localities of the east sector of north Qilian Mountain, north China, the majority in Jingyuan County, Gansu Province. The Carboniferous of the east sector of north Qilian Mountain, typical marine alternating with non2marine facies, has been subdivided lithologically into Qianheishan (Tournaisian-Visean), Chouniugou (Visean), Jingyuan (Serpukhovian), Hongtuwa (Bashkirian), Yanghukou (Bashkiri2 an, Moscovian and Kazimovian) and Jingci (Gzhelian) Formations (Li et al.，1974; Wu et al., 1987; Yang et al., 1997). In this paper we examine in detail the Lower Carboniferous microvertebrate fossils from Heishan area of Nei Mongol and Jingyuan, Gansu Province, and give the fish assemblage sequence in Qianheishan, Chouniugou and Jingyuan formations (Early Carboniferous). The early Carboniferous Actinopterygians and Elasmobranchians: Xenacanthida and Hybodontiformes are the first record from China. The material described here is housed in the Institute of Vertebrate Paleontology and Paleoanthropology (IVPP), Chinese Academy of Sciences.

摘要： 对甘肃靖远一带和内蒙古自治区黑山地区早石炭世前黑山组、臭牛沟组和靖远组中三亚纲鱼类微体化石进行了形态学和古组织学研究。这些化石涉及7 个目或亚目,含4 属4种,其中有2 新种。文中记述的属均为全球广布的属。建立了3 个早石炭世鱼类组合,这是我国早石炭世第一个鱼类组合序列。辐鳍鱼类和软骨鱼类中2 个目的化石均为我国早石炭世鱼类的首次记录。