一、绪言解放后,特别是无产阶级文化大革命以来,由于区域地质普查勘探工作的深入开展,在滇、黔、川、桂以及长江中下游地区发现了大量的无颌类及鱼类化石,进而证明了早泥盆世的无颌类和鱼类化石,在中国南方分布广泛,属种众多,为进一步划分和对比早泥盆世地层提供了生物的依据。 I. INTRODUCTION Since the liberation of the proletarian cultural revolution in particular, a large number of jawless and fish fossils have been found in Yunnan, Guizhou, Sichuan, Guangxi and the middle and lower reaches of the Yangtze River due to the in-depth exploration of regional geological census. It is proved that the Early Devonian jawless and fish fossils are widely distributed in southern China and have many genera and provide the basis for further dividing and contrasting the Early Devonian strata.