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 Cyllamyces Ozkose, B.J. Thomas, D.R. Davies, G.W. Griff. & Theodorou (2001) [monotypic] Cyllamyces aberensisᵀ Ozkose, B.J. Thomas, D.R. Davies, G.W. Griff. & Theodorou (2001)