The fuxianhuiid arthropod Guangweicaris spinatus, from the lower Cambrian (Series 2, Stage 4), Guanshan Biota
(Wulongqing Member, Canglangpu Formation), located in the vicinity of Kunming (Yunnan Province, southwest
China), is redescribed based on new specimens and a re-examination of previously described material. A more complete
overview of its morphology is given. Newly recognised features include: (i) a medial cephalic bulge; (ii) a tripartite
hypostome; (iii) a pair of specialized post-antennal appendage (SPA); (iv) a putative telson; (v) two pairs of spines on
the posteroventral margin of the terminal abdominal segment. This information is used to provide an emended diagnosis
of the family Fuxianhuiidae, and the genus Guangweicaris.

Key words: Arthropoda, Euarthropoda, Fuxianhuiida, Fuxianhuiidae, Guanshan Biota, Cambrian, Asia.

Hong Chen [chenhong3397258@126.com], Yunnan Key Laboratory for Palaeobiology, Yunnan University, Kunming 650091, China; MEC International Laboratory for Palaeobiology and Palaeoenvironment, Yunnan University, Kunming 650091, China; School of Biological Sciences and Technology, Liupanshui Normal University, Liupanshui, Guizhou 553004, China. David A. Legg [david.legg@manchester.ac.uk], School of Earth and Environmental Sciences, University of Manchester, Manchester M13 9PL, UK. Da-You Zhai [dyzhai@ynu.edu.cn], Yu Liu [yu.liu@ynu.edu.cn], and Xian-Guang Hou [xghou@ynu.edu.cn], Yunnan Key Laboratory for Palaeobiology, Yunnan University, Kunming 650091, China; MEC International Laboratory for Palaeobiology and Palaeoenvironment, Yunnan University, Kunming 650091, China.