Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Protozoa Goldfuss, 1818 see Kingdom Protozoa Goldfuss, 1818
     Class Rhizopoda see Phylum Rhizopoda Dujardin, 1835
       Order Testacea
         1 Genus [Euglypha] Dujardin, 1841
         2 Genus Arcella Ehrenberg, 1830
         3 Genus [Lequeureusia] see Genus Lesquereusia Schlumberger, 1845
         4 Genus [Difflugia] Leclerc, 1815
         5 Genus [Centropyxis] Stein, 1857