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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。
In recent years, a large number of arthropod egg-shaped Sichuan Dianfang fossils have been found in Haikou town and Dabanqiao area near Kunming, Yunnan. These fossils belong to Chengjiang biota, and the fossils are located in the Lower Cambrian Yu-shan group. The continuous excavation of the oviparous Phalaenopsis fossils makes the research and recognition of this genus fossil to a great extent make new progress. Based on the statistical statistics of fossils, this paper first summarizes many ways of fossil preservation and analyzes the environmental conditions during its burial. Secondly, it analyzes some interesting habits of Eichhornia crassipes and preliminarily divides the growth of Eichhornia crassipes After three stages of ecdysis, the sex characteristics of the male and the female, including the anatomy of the external morphology and internal organs, were described comparatively. The article reveals the living environment and movement mode of Eichhornia crassipes, and compares Eucalyptus urophylla with mid-Cambrian shrimp in order to give a reliable evidence that they can not be classified as a genus.