Records of marine microturbellarians in Japan. A. Map shows the documented occurrences of marine microturbellarians reported from Japan. The size and numbers within the pie chart represent the number of recorded species from a) the Okhotsk Sea coast of Hokkaido, b) the Sea of Japan coast of Hokkaido, c) the Pacific coast of Hokkaido, d) Mutsu Bay and the brackish water areas of Aomori, and e) the Pacific coast of Kanagawa. The small circles without numbers indicate single species from the Inland Sea, East China, and the Pacific coasts of Okinawa and Ishigaki Islands, respectively. B. Magnification of the area, including Okinawa, with a star designating the type locality of Reinhardorhynchus ryukyuensis n. sp. C. Magnification of the area, including Kanagawa, with a star designating the type locality of R. sagamianus sp. nov.