Kingdom Fungi R.T.Moore (1980) - fungi
   Phylum Neocallimastigomycota M.J. Powell (2007) [monotypic]
     Class Neocallimastigomycetes M.J. Powell (2007) [monotypic]
       Order Neocallimastigales J.L. Li, I.B. Heath & L. Packer (1993)
         Family Neocallimastigaceae I.B. Heath (1983)
           Genus Oontomyces Dagar, Puniya & G.W. Griff. (2015) [monotypic]
             Oontomyces anksriᵀ Dagar, Puniya & G.W. Griff.