Phylum Sarcodaria Milne-Edwards,1850
 Superclass Rhizopoda Dujardin, 1835
 Class Lobosa Carpenter, 1861
 Subclass Testacealobosa de Saedeleer, 1934
 Order Thecolobosa Haeckel, 1878 (=Arcellinida auctorum)
 Superfamily Arcellacea Ehrenberg, 1830
 Family Difflugidae Stein, 1859
 Genus Cucurbitella (Carter, 1856)
 Cucurbitella tricuspis (Carter) Medioli et al., 1987
 Genus Difflugia Leclerc in Lamarck, 1816
 Difflugia amphora Wallich, 1864
 Difflugia bacillariarum Perty, 1849
 Difflugia bidens Penard, 1902
 Difflugia corona Wallich, 1864
 Difflugia fragosa Hampel, 1898
 Difflugia globulus (Ehrenberg, 1848)
 Difflugia oblonga Ehrenberg, 1832
 Difflugia protaeiformis Lamarck, 1816
 Difflugia urceolata Carter, 1864
 Genus Lagenodifflugia (Leidy, 1874)
 Lagenodifflugia vas (Leidy, 1874)
 Genus Lesquereusia (Schlumberger, 1845) 
 Lesquereusia spiralis (Ehrenberg, 1840)
 Genus Pontigulasia Rhumbler, 1895
 Pontigulasia compressa (Carter, 1864)
 
 Family Centropyxididae Deflandre, 1953
 Genus Centropyxis Stein, 1859
 Centropyxis aculeata (Ehrenberg, 1832)
 Centropyxis constricta (Ehrenberg, 1843)
 
 Family Arcellidae Ehrenberg, 1830
 Genus Arcella Ehrenberg, 1830
 Arcella vulgaris Ehrenberg, 1930
 
 Family Hyalospheniidae Schulze, 1877
 Genus Heleopera Leidy, 1879
 Heleopera sphagni (Leidy, 1874)