organisms
 see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
  
 Domain eukaryotes
 see Domain Eukaryota Chatton, 1925
    
 amoeboid and flagellated protists
      
 Order Pelobiontida Page, 1976
 see Order Rhizomastigida Doflein, 1916
        
 Family Pelomyxidae Schulze, 1877
          
 1 Genus Pelomyxa Greeff, 1874
          
 2 Genus Mastigina Frenzel, 1897