Abstract: The late Mr. Liu Zhicheng (1982) established a new leptolepid-level fish— Longdeichthys luoiiaxiaensis, based on the specimens from the "Upper Jurassic" of Ningxia (V2333) and Nei Mongol (2334), and considered that this genus belongs to the family Leptolepidae. During the field works in 1990—1991, we have collected a large number of specimens of Longdeichthys from the Jiufotang Formation of Yixian, Chaoyang and Heishan of Liaoning Province (Northeastern China), of which the materials from Boluochi of Chaoyang are detached and scattered bones, partially well preserved, and concurrent with the early birds —Cathayornis Zhou, Jin and Zhang, 1992 etc.

摘要： 依据辽宁西部三个地点的新材料和宁夏、内蒙古的标本，对罗家峡隆德鱼(Longdeichthys luojiaxiaensis Liu, 1982)的形态特征作了补充描述和修订，并初步分析讨论了“薄鳞鱼类”的研究现状以及隆德鱼的系统关系。认为隆德鱼可能已是鲱头鱼派(Clupeocephala)的成员，与德国和法国基末里期的Leptolepides sprattiformis (Blainville)最为相近。