Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Chordata Bateson, 1885 - chordates
     Subphylum Vertebrata Cuvier, 1812 - vertebrates
       Class Mammalia Linnaeus, 1758 - mammals
         Grandorder Archonta Gregory, 1910
           Mirorder Primatomorpha Beard, 1991
             Order †Plesiadapiformes Simons & Tattersall, 1972 see Suborder Plesiadapiformes Simons & Tattersall, 1972
               Superfamily †Plesiadapoidea Trouessart, 1897
                 Family †Paromomyidae Simpson, 1940
                   Genus †Arcius Godinot, 1984
                     1 †Arcius rougieri Godinot, 1984
                     2 †Arcius fuscus (Russell et al., 1967)
                     3 †Arcius lapparenti (Russell et al., 1967)