Saito S, Chai J Y, Kim K H, Lee S H, Rim H J
Department of Immunology and Parasitology, Yamagata University School of Medicine, Japan.
Korean J Parasitol. 1997 Dec;35(4):223-32. doi: 10.3347/kjp.1997.35.4.223.
Metagonimus miyatai n. sp. (Digenea: Heterophyidae) is described based on adult flukes collected from experimental dogs and hamsters fed with metacercariae encysted in the sweetfish, Plecoglossus altivelis, dace, tribolodon hakonensis and T. taczanowskii, common fat-minnow, Morocco steindachneri, pale chub, Zacco platypus, and dark chub, Zacco temmincki, and on those collected from naturally infected humans. The new species was morphologically compared with M. yokogawai and M. takahashii obtained from experimental animals fed with the sweetfish and the crucian carp, Carassius carassius, respectively. The uterine loops of M. miyatai reached near the posterior end of the body through the space between the two testes, whereas those of M. yokogawai, occupied only the space between the acetabulum and anterior border of two testes. This uterine tubule distribution was similar to that of another closely related species, M. takahashii. However, vitellaria of M. miyatai ended in front of the posterior end of the left testis, while those of M. takahashii reached the posterior end of the left testis and ran it over. By raising M. miyatai as a new species, differentiation of M. yokogawai and M. takahashii became very clear. A key to the species of the genus Metagonimus in the Far East has been proposed.
宫田后睾吸虫新种（复殖目：异形科）是根据从实验犬和仓鼠体内采集的成虫描述的，这些实验动物投喂了分别囊蚴于香鱼、日本公鱼、高体雅罗鱼、麦氏雅罗鱼、黑鳍鳈、条纹小鳔鮈、宽鳍鱲和马口鱼体内的囊蚴，以及从自然感染的人体采集的成虫。将该新种与分别从投喂香鱼和鲫鱼的实验动物体内获得的横川后睾吸虫和高桥后睾吸虫进行了形态学比较。宫田后睾吸虫的子宫环通过两个睾丸之间的空间到达虫体后端附近，而横川后睾吸虫的子宫环仅占据腹吸盘与两个睾丸前缘之间的空间。这种子宫小管的分布与另一个近缘种高桥后睾吸虫相似。然而，宫田后睾吸虫的卵黄腺在左睾丸后端前方结束，而高桥后睾吸虫的卵黄腺到达左睾丸后端并越过该端。通过将宫田后睾吸虫定为新种，横川后睾吸虫和高桥后睾吸虫的区别变得非常明显。提出了远东后睾吸虫属物种的检索表。
