| Macrostomum tuba Graff, 1882 | prior to 1930 |  |  | Rice field near Kyoto. | 
| Dendrocoelopsis kishidae Kawakatsu, Ogawara & Tarui, 1978 | May 3, 1951 |  |  | two sexually mature specimens from spring-fed field for the Japanese parsley, Nishioji-Shichijo, the southwestern part of Kyoto City. | 
| Rhynchomesostoma rostratum (Müller, 1774) | 1953 or earlier |  |  |  | 
| Microdalyellia fusca (Fuhrmann, 1894) | 1930 or earlier |  |  | Kyoto u. Osaka (Bestimmung unishcer, vgl. Beklemishcev 1950) | 
| Artioposthia japonica Kaburaki, 1922 | 1922 or earlier |  |  | "This new species is one of commonest forms in Japan; it was procured in fair abundance In Nikko, at Itaya in Prov. Iwashiro and in the neighborhoods of Tokyo and Kyoto." |