The developmental trend of labrum and median eyes of Orsten-type preserved Phosphatocopina (Crustacea)

作     者：LIU Zheng 1,2 & DONG XiPing 1,2 1 School of Earth and Space Sciences,Peking University,Beijing 100871,China 2 State Key Laboratory of Palaeobiology and Stratigraphy,Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences,Nanjing 210008,China 

作者机构：School of Earth and Space Sciences Peking University Beijing China State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing China 

出 版 物：《Science China Earth Sciences》 (中国科学（地球科学英文版）)

年 卷 期：2010年第53卷第1期

页      面：18-26页

核心收录：

学科分类：070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 0704[理学-天文学] 

基　　金：supported by National Natural Science Foundation of China (Grant Nos.40772008 and 40572003) the Research Fund for Doctoral Program of High Education (Grant No.20060001059) State Key Laboratory of Palaeobiology and Stratigraphy,Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences (Grant No.103102) 

主　　题：Phosphatocopina Crustacea Orsten-type preservation morphology ontogeny Cambrian South China Sweden 

摘      要：The Phosphatocopina (Crustacea,Arthropoda) is an important group of Orsten-type preserved *** is resolved as the sister-group of *** we study the labrum,the median eyes,and the inner lamella of Phosphatocopina based on the selected specimens respectively from western Hunan,South China,and *** labrum characters of different species exhibit interspecific *** ratio of labrum length/shield length is significant to the reconstruction of the ontogeny of *** labrum characters should be introduced to the diagnosis of *** the earliest growth stage,the median eyes were inconspicuous,almost as flat as the other area of the ***,with the growth of the individuals they became *** were two obviously concave structures on the ventral side of the hypostome in later stages,which were the positions where the median eyes should have been *** addition,the two modes of preservation of the inner lamella,i.e.,that of shrinking and that of bulging up,are interpreted as the preservational artifact herein.