Class Mammalia Linnaeus, 1758 - mammals
   Subclass Boreosphenida Luo, Cifelli & Kielan-Jaworowska, 2001 - tribotherians see Clade Boreosphenida Luo, Cifelli & Kielan-Jaworowska 2001
     Family †Picopsidae Fox, 1980, incertae sedis
       1 Genus †Picopsis Fox, 1980 [monotypic]
       2 Genus †Comanchea Jacobs, Winkler & Murry, 1989 [monotypic]