中国寒武纪三叶虫生物地理趋议

寒武纪三叶虫除北疆和藏南尚无可靠报道外，在中国各地均有广泛分布。三叶虫证据表明，除兴安区的额尔古纳一兴安地体和早寒武世中天山一北山地体显示了与西伯利亚和劳伦陆块在动物群方面的密切相关外，中国寒武纪的所有板块和大部分地体（包括中及晚寒武世的中天山～北山地体）均系当时东泛冈瓦纳的重要组成部分，在生物地理上彼此密切关联。对这些属于东泛冈瓦纳的中国区块的生物地理格局的进一步探讨，主要侧重于它们台地相浅水三叶虫动物群之间的对比，特别是立足于来自动物群纪录比较完整的华南、塔里木和华北板块的证据。综合分析研究表明这些板块和有关的地体在中及晚寒武世应归属同一生物地理区，而在早寒武世则可划分为两个生物地理亚区：一个由华南、塔里木板块和安南或印支地体组成，另一仅以华北板块为代表。

NOTES ON CAMBRIAN TRILOBITE BIOGEOGRAPHY OF CHINA

Although there is no reliable information hi-therto reported from the Northern Xinjiang and Southern Tibet terranes,Cambrian trilobites are widely distributed in China. Trilobite evidence indicates that all the plates and some of the other terranes (including the Middle and Late Cambrian Middle Tianshan-Beishan Terrane) in China exhi-bit a close biogeographic link and may have formed part of eastern Peri-Gondwana during the Cambrian,with the exception of the Hinggan Region and the Early Cambrian Middle Tian...