Kingdom Fungi R.T.Moore (1980) - fungi
   Phylum Glomeromycota C. Walker & A. Schüssler (2001) - arbuscular mycorrhizal fungi
     Class Paraglomeromycetes Oehl, G.A. Silva, B.T. Goto & Sieverd. (2011) [monotypic]
       Order Paraglomerales C. Walker & A. Schüßler (2001)
         Family Pervetustaceae Błaszk., Chwat, Kozłowska, Symanczik & Al-Yahya'ei (2017) [monotypic]
           Genus Pervetustus Błaszk., Chwat, Kozłowska, Symanczik & Al-Yahya'ei (2017) [monotypic]
             Pervetustus simplexᵀ Błaszk., Chwat, Kozłowska, Crossay, Symanczik & Al-Yahya'ei