Mattison R G, Hanna R E, Nizami W A
School of Biology and Biochemistry, Queen's University of Belfast, Northern Ireland, UK.
J Helminthol. 1994 Sep;68(3):211-21. doi: 10.1017/s0022149x00014371.
The tegument of juvenile Paramphistomum epiclitum and Fischoederius elongatus (Paramphistomidae: Digenea) resembles those of other digeneans. Seven types of papillae were observed, mostly on the oral and acetabular surfaces, and increase in number during migration. Also evident are two types of secretory body (T1 and T2) which are synthesized separately in tegumental cytons underlying the syncytium. Exocytosis of T2 bodies occurs at the apical membrane and appears to contribute to a fibrous glycocalyx. The tegumental syncytium lining the pharynx and acetabulum is thinner and has a higher capacity for vacuolation than the general tegument. These may represent important sites for osmoregulation. The absence of mitochondria from the tegument in migrating juveniles suggests limited involvement in energy demanding processes. Pigmentation of the subtegument is first evident in mature cercariae and is progressively eliminated during migration.
幼年卷棘口吸虫和长菲策吸虫（双口科：复殖目）的皮层与其他复殖吸虫的皮层相似。观察到七种类型的乳头，大多分布在口部和吸盘表面，且在移行过程中数量增加。同样明显的是两种分泌体（T1和T2），它们在合胞体下方的皮层细胞中分别合成。T2体的胞吐作用发生在顶端膜，似乎有助于形成纤维状糖萼。咽和吸盘内衬的皮层合胞体比一般皮层更薄，空泡化能力更强。这些可能是渗透调节的重要部位。移行期幼体的皮层中没有线粒体，这表明其在能量需求过程中的参与有限。皮层下色素沉着在成熟尾蚴中首次明显出现，并在移行过程中逐渐消失。
