Kingdom Fungi R.T.Moore (1980) - fungi
   Phylum Glomeromycota C. Walker & A. Schüssler (2001) - arbuscular mycorrhizal fungi
     Class Glomeromycetes Caval.-Sm. (1998)
       Order Archaeosporales C. Walker & A. Schüßler (2001)
         Family Geosiphonaceae Engl. & E. Gilg (1924)
           Genus Geosiphon F. Wettst. (1915)
             Geosiphon pyriformis (Kütz.) F. Wettst. (1915)