| author | date | title | journal / publication | Bourlat SJ, Nielsen C, Lockyer AE, Littlewood TJ | 2003 | Xenoturbella is a deuterostome that eats molluscs. | Nature 424:925-928 |
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| Xenacoela Xenoturbellida Bourlat, Juliusdottir, Lowe, Freeman, Aronowicz, et al., 2006 | w | other taxonomic work |