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
几无二致，从而表明这
早寒武世是地球上半索门中已知最古老的祖先类型。
源自
