| author | date | title | journal / publication | Ruiz-Trillo I, Riutort M, Littlewood DTJ, Herniou EA, Baguna J | 1999 | Acoel flatworms: earliest extant bilaterian metazoans, not members of Platyhelminthes. | Science 283: 1919-1923 |
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| Paratomella rubra Rieger & Ott, 1971 | w | other research on this sp. |