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.
这种独特的型与现生肠鳃类
索动物几无二
,从而表明这个早寒武世动物是地
索动物门中已知最古老的祖先类型。