The special body plan of Yunnanozoon is almost identical to that of the living enteropneust hemichordate Balanoglossus,which suggests that the earlyCambrian creature is ancestral to the hemichordates.

这种独特的身体造型与现生肠鳃类半索动二，从这个早寒武世动是地球上半索动门中已知最古老的祖先类型。