Class Mammalia Linnaeus, 1758 - mammals
Count: [*†*] 5o; †16o;76f;282g;438s
   Subclass †Allotheria Marsh, 1880
  Count: [†*] †2o;23f;81g;133s [16 Mar 2022]
     Order †Multituberculata Cope, 1884
    Count: [†*] †19f;76g;125s [14 Mar 2022]
       Suborder †"Plagiaulacida" Ameghino, 1889 [paraphyletic]
      Count: [†*] †8f;36g;56s [13 Mar 2022]
         †Plagiaulacid line
        Count: [†*] †3f;10g;17s [13 Mar 2022]
           Family †Albionbaataridae Kielan-Jaworowska & Ensom, 1994
          Count: [†*] †2g;2s [13 Mar 2022]
             Genus †Proalbionbaatar Hahn & Hahn, 1998 [monotypic]
            Count: [†*] †1s [13 Mar 2022]
               1 †Proalbionbaatar plagiocyrtus Hahn & Hahn, 1998
              Count: -