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
             Family †Purgatoriidae Van Valen & Sloan, 1965
               Genus †Purgatorius Van Valen & Sloan, 1965
                 1 †Purgatorius unio Van Valen & Sloan, 1965
                 2 †Purgatorius titusi Buckley, 1997
                 3 †Purgatorius janisae Van Valen, 1994