Guangweicaris is an extinct genus of fuxianhuiid arthropod known from the Cambrian period.

It is only known from the type species Guangweicaris spinatus, which is known from the Cambrian Stage 4 Guanshan Biota near Kunming.

Within the fuxianhuiids it is sister to Fuxianhuia, together forming the clade Fuxianhuiidae.

In comparison to Fuxianhuia it has a wide, oval shaped opisthothorax and a proportionally longer, narrow tail-like abdomen, with 3 prothoracic tergites, 5 opisthothoracic tergites and 7 abdominal tergites, it also possesses a row of spines running down the central axis of the body from the second opisthothoracic tergite.

[2] From [3] Shankouia Liangwangshania Alacaris Chengjiangocaris Fuxianhuia Guangweicaris