封面说明：三水金龙鱼(Scleropages sanshuiensis sp. nov.)复原图。产于广东三水盆地下始新统华涌组的三水金龙鱼是金龙鱼属的第二个化石种。与金龙鱼属的其他4个现生种和一个化石种相比较，三水金龙鱼和中华金龙鱼更为接近。三水金龙鱼与中华金龙鱼均有与现生金龙鱼相似的地方，尚不清楚它们哪一个与现生种更接近。中生代骨舌鱼类主要发现于中国，始新世骨舌鱼类化石在中国的发现也在逐渐增多，金龙鱼属(Scleropages)和骨舌鱼属(Osteoglossum)的共同祖先在始新世以前可能生存于东亚，并随后扩散到澳洲和世界其他地方。详见张江永文(p. 100) (绘图：许勇)
Cover image: The reconstruction of Scleropages sanshuiensis sp. nov. found from the Lower Eocene Huayong Formation in the Sanshui Basin, Guangdong, China. It represents the second fossil species of the genus. Compared with the four extant and one fossil species of Scleropages, the new species is most similar to the fossil one, S. sinensis. Both fossil species of the genus share some characters with the extant ones. It is not clear which one is more closely related to the living fishes. In addition to the rich Mesozoic osteoglossomorphs, many Eocene ones were also found from China. The common ancestor of Scleropages and Osteoglossum may live in East Asia before the Eocene and then dispersed to Australia and other places of the world. See details in the paper of Zhang (p. 100). (Illustrated by Xu Yong)
