I.  Ijima and Kaburaki, T., ?Preliminary descriptions of some Japanese Triclada?, Annotationes zoologicae japonenses / Nihon do?butsugaku iho?, vol. 9, pp. 153-171, 1916.

T.  Yamada, ?Report on the ecological survey of freshwater planarians in the Teshio Mountains and its adjacent seaboard district on the Sea of Japan, Hokkaido?, Japanese Journal of Ecology, vol. 16, pp. 129-133, 1966.

M.  Kawakatsu, ?An illustrated list of japanese freshwater planarians in color?, Bulletin of Fuji Women?s College, vol. 7, pp. 45-91, 1969.