| author: | Kawakatsu M, Oki I, Tamura S, Sugino H |
| title: | Studies on the morphology, karyology, and taxonomy of the Japanese freshwater planarian Dugesia japonica Ichikawa et Kawakatsu, with a description of a new subspecies, Dugesia japonica ryukyuensis subspec. nov. |
| publication: | Bull Fuji Wom Coll 14, II: 81-126 |
| year: | 1976 |