Valkounová J
Folia Parasitol (Praha). 1987;34(2):117-28.
Histological and histochemical methods were used for the studies on 12 species of metacestodes of the genera Coronacanthus, Diorchis, Diplopylidium, Fimbriaria, Hymenolepis, Microsomacanthus, Rodentotaenia, and Triodontolepis. Two basic types of larvae, cysticercoid and cercoscolex, were found. The cyst structure is identical or similar in the cysticercoids using the same group of intermediate hosts (gammarus, planktonic crustaceans, coprophagous beetles, and terrestrial snails). The morphological structure of scolex and neck is the same as in adult cestodes. The length and number of hooks are definitive in morphologically differentiated metacestodes, while the scolex, rostellum and suckers grow still inside the definitive host. The excretory canals open separately at the end of neck in the cysticercoids and in a common opening at the body end of larva in the cercoscolex. Calcareous corpuscles are smaller and more numerous in the scolex and neck than in the cyst wall. Acid mucosubstances prevail in the tissues at the early stages of development. In morphologically differentiated metacestodes, the amount of neutral mucosubstances and glycogen increases. In ageing larvae, the amount of neutral mucosubstances and glycogen gradually decreases and later also decreases the amount of acid mucosubstances, proteins and lipids.
采用组织学和组织化学方法对冠棘属、双睾属、复孔绦虫属、缘宫绦虫属、膜壳绦虫属、微体棘属、啮齿绦虫属和三齿棘属的12种中绦期幼虫进行了研究。发现了两种基本类型的幼虫，即似囊尾蚴和尾蚴型幼虫。使用同一组中间宿主（钩虾、浮游甲壳类动物、食粪甲虫和陆生蜗牛）的似囊尾蚴的囊结构相同或相似。头节和颈部的形态结构与成虫绦虫相同。在形态学上分化的中绦期幼虫中，钩的长度和数量是确定的，而头节、顶突和吸盘仍在终末宿主体内生长。排泄管在似囊尾蚴颈部末端单独开口，在尾蚴型幼虫身体末端共同开口。头节和颈部的石灰小体比囊壁中的更小且更多。在发育早期，组织中酸性粘多糖占优势。在形态学上分化的中绦期幼虫中，中性粘多糖和糖原的含量增加。在衰老幼虫中，中性粘多糖和糖原的含量逐渐减少，随后酸性粘多糖、蛋白质和脂质的含量也减少。
