| author | date | title | journal / publication | Girard CF | 1851 | abs. | Essay on the classification of Nemertes and Planariae, preceded by some general considerations on the primary divisions of the animal kingdom. | Proc. Amer. Assoc. for Advanc. Sci. 4th Mtg, New Haven, Conn., Aug 1850, pages 258-273. Washington 1851 |
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| Dugesiidae Dugesia Girard, 1850 | [with synonyms] | w | primary taxonomic authority (describer) |