organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Eukaryota Chatton, 1925 - eukaryotes
     Kingdom Fungi R.T.Moore (1980) - fungi
       Phylum Zygomycota Moreau (1954) see Subphylum Mucoromycotina Benny (2007)
         Class Zygomycetes Caval.-Sm. (1998)
           Order Zoopagales E.A. Bessey ex R.K. Benj. (1979)
             1 Family Cochlonemataceae Dudd. (1974)
             2 Family Helicocephalidaceae Boedijn (1959)
             3 Family Piptocephalidaceae Sred. (1873)
             4 Family Sigmoideomycetaceae Benny, R.K. Benj. & P.M.Kirk (1992)
             5 Family Zoopagaceae Drechsler (1938)