Class Mammalia Linnaeus, 1758 - mammals
   Subclass †Allotheria Marsh, 1880
     Order †Multituberculata Cope, 1884
       Suborder †"Plagiaulacida" Ameghino, 1889 [paraphyletic]
         †Paulchoffatiid line
           Family †Paulchoffatiidae Hahn, 1969
             Genus †Sunnyodon Kielan-Jaworowska & Ensom, 1992 [monotypic]
               1 †Sunnyodon notleyiᵀ Kielan-Jaworowska & Ensom, 1992