(Dugong_dugon,(Hydrodamalis_gigas,((Anomotherium_langewieschei,Miosiren_kocki),(Potamosiren_madgalenensis,(Ribodon_limbatus,(Trichechus_inunguis,Trichechus_hesperamazonicus,(Trichechus_manatus_latirostris,Trichechus_senegalensis)))))));