Abstract: The fossil holostean described here was collected from Jurong County, Southern Jiangsu Province, and referred to a new species, Sinolepidotus longidorsalis, of the genus Sinolepidotus. This new species resembles Sinolepidotus chekiangensis in its body form, elongated dorsal fin, small mouth, deep coronoid process of the mandible, and deep scales in the middle portion of the flank and dorsal region of the body. However, it is characterized by longer dorsal fin, large number of rays of dorsal fin, acute snout, lack of pectinations of scales, and thus is distinguished from Sinolepidotus chekiangensis. The genus Sinolepidotus is reviewed and its systematic position within the Order Semionotiformes is uncertain. According to the nature of Sinolepidotus and invertebrate fossils, the age of the fish-bearing beds is considered as Early Cretaceous.

摘要： 记述了在江苏句容发现的中华鳞齿鱼属(Sinolepidotus) 一新种———长背鳍中华鳞齿鱼(Sinolepidotus longidorsalis sp. nov.) 。新种的一般形态特征如身体高纺锤形,背鳍长,臀鳍离尾鳍近,头骨外部骨片的形状及排列格局,口裂小,下颌骨有较高的冠状突,口缘牙齿高而尖,体侧中部和背区的一些鳞片高显著大于宽等,与浙江早白垩世的浙江中华鳞齿鱼(Sinolepidotus chekiangensis) 很相似。但新种具有背鳍较长,背鳍鳍条数目较多,吻突尖,及鳞片后缘梳状齿不发