Class Mammalia Linnaeus, 1758 - mammals
   †"Symmetrodontans" Simpson, 1925, incertae sedis see Infraclass Symmetrodonta Simpson, 1925
     Family †Amphidontidae Simpson, 1925
       1 Genus †Amphidonᵀ Simpson, 1925 [monotypic]
       2 ?Genus †Manchurodon Yabe & Shikama, 1938 [monotypic]
       3 ?Genus †Nakunodon Yadagiri, 1985 [monotypic]