Class Mammalia Linnaeus, 1758 - mammals †"Symmetrodontans" Simpson, 1925, incertae sedis see Infraclass Symmetrodonta Simpson, 1925 Genus †Gobiotheriodon Trofimov, 1997, incertae sedis [monotypic] 1 †Gobiotheriodon infinitus (Trofimov, 1980)