Class [Mammalia] Linnaeus, 1758 - mammals
Count: -
   Order †Plesiadapiformes Simons & Tattersall, 1972 see Suborder Plesiadapiformes Simons & Tattersall, 1972
  Count: [†*] †9f;44g;99s
     Superfamily †Plesiadapoidea Trouessart, 1897
    Count: [†*] †5f;24g;67s
       Family †Paromomyidae Simpson, 1940
      Count: [†*] †8g;17s
         Genus †Ignacius Matthew & Granger, 1921
        Count: [†*] †4s
           1 †Ignacius graybullianus Bown & Rose, 1976
          Count: -
           2 †Ignacius frugivorus (Matthew & Granger, 1921)
          Count: -
           3 †Ignacius fremontensis (Gazin, 1971)
          Count: -
           4 †Ignacius mcgrewi
          Count: -