Rouse, G. (1998年) "The Annelida and their close relatives" in Anderson, D.T. , ed. Invertebrate Zoology、Oxford University Press、pp. 178 ISBN: 0195513681. (fig 8.2 a).
Key
Prostomium
Peristomium
O Mouth
Growth zone
Pygidium
O Anus
日付
22:27 (UTC)
原典
投稿者自身による著作物 (Original text: I created this work entirely by myself.)