An early Cambrian Sidneyia(Arthropoda) resolves the century-long debate of its head organization  

作　　者：Kunsheng DU David L.BRUTON Jie YANG Xiguang ZHANG 

机构地区：[1]Research Center of Paleobiology,Yuxi Normal University,Yuxi 653100,China [2]Institute of Paleontology,Yunnan University(Chenggong),Kunming 650500,China [3]Natural History Museum(Geology),University of Oslo,Postboks 1172 Blindern,Oslo NO-0318,Norway

出　　处：《Science China Earth Sciences》2023年第3期521-527,共7页中国科学（地球科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 41730318, 42162002 and 42202003);the Innovative Research Fund of Yuxi Normal University (Grant No. 202111390020)。

摘　　要：We report the extraordinarily preserved euarthropod Sidneyia minor sp.nov.from the Cambrian Stage 3 Xiaoshiba Lagerst?tte in Yunnan,South China.So far this is the earliest occurrence of the genus.As with other species of Sidneyia,the new taxon shares similar features such as a crescent-shaped head shield with paired lateral notches for stalked eyes,but more significantly and new,is the presence of three pairs of post-antennal appendages beneath the head shield identified by micro-CT methods.We conclude that Sidneyia is a sister group to other members of Vicissicaudata within the diverse radiation of Artiopoda.

关 键 词：Sidneyia Cephalic organization Euarthropods PHYLOGENETICS Evolution Cambrian Stage 3 

分 类 号：P534.41[天文地球—古生物学与地层学]