Kingdom Fungi R.T.Moore (1980) - fungi
   Subphylum Kickxellomycotina Benny (2007) see Phylum Kickxellomycota Tedersoo, Sánchez-Ramírez, Kõljalg, Bahram, M. Döring, Schigel, T.W. May, M. Ryberg & Abarenkov (2018)
     Order Harpellales Lichtw. & Manier (1978)
       Genus Smittium R.A. Poiss. (1937)