| author | date | title | journal / publication | Bardeen CR | 1903 | abs. | Factors in Heteromorphis in Planarians. | Arch. f. Entwickelungsmech. 16. Bd. Leipzig 1903. pages 1-20, with 18 figures. |
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| Phagocata gracilis Leidy, 1847 | w | other research on this sp. | ||
| Planaria maculata(2) Dalyell, 1853 | w | other research on this sp. | ||
| Planaria lugubris Schmidt, 1861 | w | other research on this sp. |