After McKenna & Bell, 1997

<==o †Cocomyinae de Bruijn, Hussain & Leinders, 1982 [Cocomyidae de Bruijn, Hussain & Leinders, 1982; †Cocomyidae Dawson, Li & Qi, 1984; †Cocomyinae Dashzeveg, 1990] [incl. †Tanquammyidae Shevyreva, 1983; †Orogomyidae Dashzeveg, 1990]
   |-- †Orogomys obscurus Dashzeveg, 1990; L.Eoc. As. [jr. syn. of †Ivanantonia efremovi Shevyreva, 1989?]
   |-- †Bumbanomys edestus Shevyreva, 1989; L.Eoc. As.
   |-- †Adolomys ameristus Shevyreva, 1989 [Adolomys  Shevyreva, 1983 (nomen nudum); Abolomys (lapsus calami)] L.Eoc. As.
   |-- †Tsagankhushumys deriphatus Shevyreva, 1989 [Tsagankhushumys Shevyreva, 1983 (nomen nudum)] L.Eoc. As.
   |-- †Cocomys lingchaensis Dawson, Li & Qi, 1984; L.Eoc. As.
   |--o †Sharomys Dashzeveg, 1990; L.Eoc. As.
   |  |-- †S. singularis Dashzeveg, 1990
   |  `-- †S. parvus Dashzeveg, 1990
   |--o †Kharomys Dashzeveg, 1990; L.Eoc. As.
   |  |-- †K. mirandus Dashzeveg, 1990
   |  `-- †K. gracilis Dashzeveg, 1990
   |-- †Tsagamys subitus Dashzeveg, 1990; L.Eoc. As.
   |-- †Alaymys ctenodactylus Averianov, 1993 [Alaymys Averianov, 1991 (nomen nudum)]; L.Eoc. As.
   |-- †Ulanomys mirificus Dashzeveg, 1990; L.Eoc. As.
   |-- †Tsinlingomys youngi Li, 1963; M.Eoc. As.
   `--o †Tamquammys Shevyreva, 1971; M.Eoc. As.
      |-- †T. dispinorum
      |-- †T. wilsoni
      `-- †T. tantillus