Class Mammalia Linnaeus, 1758 - mammals
   Subclass Boreosphenida Luo, Cifelli & Kielan-Jaworowska, 2001 - tribotherians see Clade Boreosphenida Luo, Cifelli & Kielan-Jaworowska 2001
     Genus †Hypomylos Sigogneau-Russell, 1992, incertae sedis
       1 †Hypomylos phelizoniᵀ Sigogneau-Russell, 1992
       2 †Hypomylos micros Sigogneau-Russell, 1995