| author | date | title | journal / publication | Andrikou C, Thiel D, Ruiz-Santiesteban JA, Hejnol A | 2019 | Active mode of excretion across digestive tissues predates the origin of excretory organs | PLOS Biology 17(7): e3000408 22 pp [doi: 10.1371/journal.pbio.3000408 goto] |
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| Isodiametra pulchra (Smith & Bush, 1991) | w | other research on this sp. | ||
| Meara stichopi Westblad, 1949 | w | other research on this sp. | ||
| Xenacoelomorpha Nemertodermatida Karling, 1940 | w | other research on this sp. | ||
| Xenacoela Acoela Uljanin, 1870 | w | other research on this sp. |