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.
这种独特的身体造与现生肠鳃类半索动物几
,从而表
这个早寒武世动物是地球
半索动物门中已知最古老的祖先类
。