The Lamellibranchia fossils collected from the Pusige Formation in Aqike, Luopu County of the Southeastern Margin Of the Tarim Basin have been systematically studied in this paper, with a thorough discussion on fossil associations and their ages.
本文系统研究了塔里木盆地东南缘洛浦阿其克普斯格组的瓣鳃动物化石，讨论了化石组合特点及地质时代。
This evolutionary feature,together with recent findings of priapulans-like fossil embryos,is rather critical to investigate into the origin of the metamorphosis of metazoans.
鳃曳动物在寒武纪曾经辉煌一时,但因躯体构型以及生活方式等诸多因素限制,其各大支系随后相继绝灭,唯有鳃曳形目一息尚存至今。