我国泥盆纪鱼类的分布、组合和性质

文中记述了我国泥盆纪鱼类化石分布情况,并根据已描述的化石建立8个组合。

GEOLOGICAL AND PALEOGEOGRAPHICAL DISTRIBUTION OF DEVONIAN FISHES IN CHINA

The present article deals with: 1/So far 52 genera and 75 species of fossil fishes including the Agnatha and pisces have been described in China. 2/According to the difference in paleogeographic conditions and the history of Geology, the Devonian is divided into two Zoogeographical provinces in China, they are the Southern and Northern Provinces (see fig. 1). 3/On the basis of the fossils of Agnatha, Placodermi and some other fishes known so far, the 8 assemblages built in ascending order of geological age for the present in China are as follows: 1. Polybranchiaspis liaojiaoshenensis-Laxaspis qujingensis assemblage, 2. Yunnanolepis chii-Youngolepis praecursor assemblage, 3. Sanchaspis magalarostra-Qingmenaspis microculus assemblage (which is of an Early Devonian age),4. Wudinolepis weni-Yinostius major assemblage, 5. Hunnanolepis tieni-Bothriolepis sinensis assemblage, 6. Bothriolepis lochangensis-Bothriolepis kwangtumgensis assemblage (that is of a Middle Devonain age), 7. Remigolepis-Changyangophyton assemblage, 8. Sinolepis macrocephalus-Asterolepis sinensis assemblage (these are of a late Devonian age). The Early Devonian assemblage is unique, especially in the light of its fossil fish contents which form a typical endemic fauna. The cosmopolitan elements were made their first appearance in the Early Middle Devonian. 4/By and large, the similarities of Arthrodira, Antiarch and Crossopterygian between China and Europe-North America indicate that these areas might belong to the same distribution range e.i. the Tethys region at that time.