Okugawa, K. 1930. ?A List Of The Fresh-Water Rhabdocoelida Found In Middle-Japan, With Preliminary Descriptions Of New Species?. Memoirs Of The College Of Science, Kyoto Imperial University, Series B 5. Memoirs Of The College Of Science, Kyoto Imperial University, Series B: 75-88, two plates.

Barrett, Jr., W. C. 1930. ?A Morphological And Cytological Study Of Macrostomum Appendiculatum?. University of Virginia Library.