(Prorastomus_sirenoides,((Elephantidae,Phosphatherium_escuillei),(Pezosiren_portelli,((Sobrarbesiren,(Eotheroides_aegyptiacum,Prototherium_veronense,Prototherium_ausetanum,((Kaupitherium_gruelli,Eotheroides_lambondrano,Eotheroides_sandersi,Eotheroides_clavigerum,((Anomotherium_langewieschei,Miosiren_kocki),(Trichechus_inunguis,(Trichechus_manatus,Trichechus_senegalensis))),(Priscosiren_atlantica,(Caribosiren_turneri,Metaxytherium_albifontanum,(Crenatosiren_olseni,(Bharatisiren_indica,(Corystosiren_varguezi,Rytiodus_capgrandi,Rytiodus_heali,(Bharatisiren_kachchhensis,(Domningia_sodhae,Dugong_dugon)),((Dioplotherium_manigaulti,(Dioplotherium_allisoni,Xenosiren_yucateca)),(ECOCHM_2491,Kutchisiren_cylindrica)))),(Nanosiren_garciae,Nanosiren_sanchezi)),(Metaxytherium_krahuletzi,(Metaxytherium_crataegense,Metaxytherium_floridanum,Metaxytherium_medium,Metaxytherium_serresii,(Metaxytherium_arctodites,(Dusisiren_jordani,(Hydrodamalis_cuestae,Hydrodamalis_gigas)))))))),(Halitherium_taulannense,Prototherium_intermedium)))),(Ashokia_antiqua,(Protosiren_fraasi,Protosiren_smithae,Libysiren_sickenbergi))))));