澄江生物群中的卵形川滇虫

近年来在云南昆明附近的海口镇和大板桥地区发现大量的节肢动物卵形川滇虫化石，这些化石隶属于澄江生物群，其所处的地层是下寒武统玉案山组。卵形川滇虫化石的不断发掘使得对该属种化石的研究和认识能在很大程度上取得新的进展。文章基于相当数量化石的信息统计，首先对化石保存的多种方式进行总结并分析其埋藏时的环境条件，其次分析卵形川滇虫一些有趣的生活习性并初步划分卵形川滇虫生长中历经3次蜕皮的发育阶段；对雌雄性个体特征（包括外部形态和内部器官的解剖）进行对照性描述。文中揭示卵形川滇虫的生活环境及运动方式，并将卵形川滇虫与中寒武世瓦普塔虾进行较为详尽的比较，列举两者不可归为一属的可靠证据。

CHUANDIANELLA OVATA FROM LOWER CAMBRIAN CHENGJIANG BIOTA

In recent years,a number of Chuandianella ovata (an arthropod) specimens have been excavated from the Yu' anshan Formation of the Lower Cambrian (the strata Chengjiang biota being excavated) in Haikou area near Kunming City.These specimens were perfectly preserved with their soft-tissues of abdomen,cephalothorax,and their carapace features.They can provide us with more biological information than those in the previously described specimens.Based on a systematic investigation,the growth stages are revealed by fossil statistics.The characters of male and female specimens are recorded separately.The different preservations of these specimens have been observed.Furthermore,the Early Cambrian Chuandianella ovata is here believed to be different from the Middle Cambrian Waptia fieldenses,and they should not be assigned to the same genus.