After Domning, 1996, 2005

<==o Trichechidae Gill, 1872 (1821) [Manatidae] (manatees; manaatit, lamantiinit)
   |--o †Miosireninae Abel, 1919
   |  |-- †Anomotherium langewieschei Siegfried, 1965
   |  `--o †Miosiren Dollo, 1889
   |     |-- †M. kocki Doll, 1889
   |     `-- †M. canhami (Flower, 1874) Sickenberg, 1934 [=? M. kocki]
   `--o Trichechinae (Gill, 1872) sensu Domning, 1994, 2005
      |-- †Potamosiren magdalenensis Reinhart, 1951
      `--+-- †Ribodon limbatus Ameghino, 1883
         `--o Trichechus Linnaeus, 1758 (manaatit; manatees)
            |-- T. inunguis (Natterer, in von Pelzeln, 1883) Trouessart, 1905 (kynnetönmanaatti; Amazonian manatee)
            `--+-- T. senegalensis Link, 1795 (afrikanmanaatti; West African manatee)
               `--o T. manatus Linnaeus 1758 (lamantiini, manaatti; West Indian manatee)
                  |-- †T. m. bakerorum Domning, 2005
                  |-- T. m. manatus Linnaeus 1758 (Antillean manatee) [Amerikan rannikot; Coastal America's]
                  `-- T. m. latirostris (Harlan, 1824) Hatt, 1934 (Floridan manatee) [Karibianmeri; Caribbean]

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