Balanoglossus

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索动物几无二致，从而表明这个早寒武世动物是地球索动物门中已知最古老的祖先型。