| 特徴： | Body elongated, tapering anteriorly, and rather elliptical at the posterior end. Head collar armed with 23 spines arranged in a single row, without ventral corner spines. Round acetabulum at the posterior end of the anterior third of the body. Cirrus sac characteristically passing beyond posterior margin of the ventral sucker. Vitellaria distributed along the ceca from the middle level of the posterior testis to the posterior end of the body. Genital pore just in front of the acetabulum. Two testes tandem, and located near the middle portion of anterior part of the posterior half of the body. Oval ovary located a little to the right of the median line between the cirrus pouch and anterior testis. Eggs immature, ovoid to elliptical, with a thin wall and a less prominent operculum. |