Amphioxus, a cephalochordate, widely considered as the closest living invertebrate relatives of the vertebrates, is a key organism for understanding evolution of developmental mechanism. Its body plan is similar to but simpler than vertebrates.
文昌鱼(Amphioxus)是一种头索动物,在分类地位上,它被认为是现存最接近于脊椎动物的无脊椎动物,一向被认为是脊椎动物的祖先而倍受生物学家的重视,它的身体构造与脊椎动物相似只是更加简单,是研究动物进化和动物胚胎发育的典型材料。
参考来源 - 青岛文昌鱼早期发育相关基因HMGB、ThymosinβN（名词） any chordate animal of the subphylum Cephalochordata, having a fishlike body and no vertebral column; a lancelet 头索动物
ADJ（形容词） of, relating to, or belonging to the Cephalochordata 头索类的