Arostrilepis horrida (Linstow, 1901) (Cestoda, Hymenolepididae) from Eothenomys spp. (Rodentia) in Japan

Four gravid specimens and several fragments of cestodes were found in the small intestine of Eothenomys smithii and E. andersoni, sampled in four different prefectures of Japan. All of the cestode specimens had a scolex without a rostellum and a cirrus armed with short spines, and the embryophore of the hexacanthe showed typical pointed ends. Therefore, the cestodes were identified as Arostrilepis horrida. But, because there is a complicated situation in the systematic position of A. horrida, a brief review of the taxa was presented.