The evaginated scolex of C.pisiformis was composed of scolex,neck and cyst,and there were some prickles which might differentiate into proglottids in the neck segment.

• 翻出头节的豆状囊尾蚴可明显地分为头节、颈部和囊泡3个部分，其中颈部有用以形成节片的棘。