| author | date | title | journal / publication | Hansen-Melander E, Melander Y, Reynoldsen TB | 1954 | A new species of freshwater Triclad belonging to he genus Polycelis. | Nature 173: 354-355 |
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| Polycelis hepta Hansen-Melander, Melander & Reynoldsen, 1954 | w | primary taxonomic authority (describer) |