Meuleman E A, Holzmann P J, Peet R C
Z Parasitenkd. 1980;61(3):201-12. doi: 10.1007/BF00925512.
The development of the mother sporocyst and the differentiation of the daughter sporocyst of Schistosoma mansoni in Biomphalaria pfeifferi are described. The tegumental structure of the mother sporocyst, consisting of an outer layer connected to internally situated nucleated cell bodies, forms extensions which enwrap the germinal cells. The parenchyma cells, in which the germinal cells were embedded before, degenerate. When daughter sporocyst embryos develop from germinal cells they are enveloped by a primitive epithelium which is formed by fusion of the extensions of the tegumental structure of the mother sporocyst. Somatic cells located peripherally in the developing daughter sporocyst expand and coalesce beneath the primitive epithelium to form the future outer layer of the tegumental structure of the daughter sporocyst. The primitive epithelium degenerates, the newly-formed layer looses its nuclei, and becomes connected to internally situated nucleated cell bodies. Further developments in the tegumental structure of the daughter sporocyst include the formation of microvillus-like projections, a surface coat, spines, and a basement membrane.
描述了曼氏血吸虫在费氏扁卷螺体内母包蚴的发育及子包蚴的分化。母包蚴的皮层结构由与内部有核细胞体相连的外层组成，形成包裹生殖细胞的突起。之前包埋生殖细胞的实质细胞退化。当子包蚴胚胎从生殖细胞发育而来时，它们被由母包蚴皮层结构的突起融合形成的原始上皮所包裹。位于发育中子包蚴周边的体细胞在原始上皮下方扩展并融合，形成子包蚴皮层结构未来的外层。原始上皮退化，新形成的层失去细胞核，并与内部有核细胞体相连。子包蚴皮层结构的进一步发育包括形成微绒毛样突起、表面被膜、棘和基底膜。
