Kingdom Fungi R.T.Moore (1980) - fungi Phylum Glomeromycota C. Walker & A. Schüssler (2001) - arbuscular mycorrhizal fungi Class Archaeosporomycetes Sieverd., G.A. Silva, B.T. Goto & Oehl (2011) [monotypic] Order Archaeosporales C. Walker & A. Schüßler (2001) Family Geosiphonaceae Engl. & E. Gilg (1924) [monotypic] Genus Geosiphon F. Wettst. (1915) [monotypic] Geosiphon pyriformisᵀ (Kütz.) F. Wettst. (1915)