文中通过对三叶虫身体尾部构造及其功能与其它节肢动物如昆虫类、肢口类等动物的腹部和尾部等比较后,提出将具有内脏器官和体节的“尾部”修订为腹部,在其后由背壳愈合而成的单一硬板,其内部不具内脏器官者,划为三叶虫的真正尾部。因而三叶虫身体可分成头部(cephalic region)、胸部(thoracic region)、腹部(abdominal region)和尾部(pygidium region)四部分,它不仅与有关节肢动物命名一致,也符合一般动物身体器官分化规律。 In this paper, by comparing the structure and function of the trilobite body with the abdomen and tail of other arthropods such as insects and limbs, it is proposed that the “tail” with internal organs and somites be revised as the abdomen , Followed by a single hard plate healing from the dorsal shell, whose internal organs without internal organs, designated as trilobites true tail. Therefore, the trilobite body can be divided into cephalic region, thoracic region, abdominal region and pygidium region. It is not only consistent with the arthropod-related name, but also with the general differentiation of body organs law.