| author | date | title | journal / publication | Knapp SE | 1954 | abs. | Notes on the occurence of some free-swimming flatworms from Northern Idaho, with the Description of a new species of Dalyellia (Order Rhabdocoelida, Class Turbellaria). | Northwest Sc 28(3)98-106 |
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| Dalyellia idahoensis Knapp, 1954 | w | primary taxonomic authority (describer) |