Kingdom Fungi R.T.Moore (1980) - fungi
   Phylum Zoopagomycota Gryganskyi, M.E. Sm., Spatafora & Stajich (2016)
     Class Zoopagomycetes Doweld (2014) [monotypic]
       Order Zoopagales E.A. Bessey ex R.K. Benj. (1979)
         Family Sigmoideomycetaceae Benny, R.K. Benj. & P.M.Kirk (1992)
           1 Genus Reticulocephalis Benny, R.K. Benj. & P.M.Kirk (1992)
           2 Genus Sigmoideomyces Thaxt. (1891) [monotypic]
           3 Genus Sphondylocephalum Stalpers (1974) [monotypic]
           4 Genus Thamnocephalis Blakeslee (1905)