Abstract

Rana pirica Matsui, endemic to Hokkaido Island, Japan, was examined for helminths. One species of Monogenea, Polystoma ozakii; three species of Nematoda, Cosmocercoides pulcher, Oswaldocruzia socialis, and Rhabdias nipponica; and one species of Acanthocephala, Acanthocephalus lucidus, were found. Rana pirica represents a new host record and Hokkaido Island a new locality record for O. socialis, R. nipponica, and A. lucidus. None of the helminths found in this study is restricted to Hokkaido Island.

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