#genus_Arcella  type genus of the Arcellidae
  supertype:  protoctist_genus  any genus of Protoctista
  member:  arcella
  member of:  family_Arcellidae__Arcellidae  soil an freshwater protozoa; cosmopolitan
     member of:  order_Testacea__Testacea  testacean rhizopods
        member of:  subclass_Rhizopoda__Rhizopoda  creeping protozoans: amoebas and foraminifers
           member of:  class_Sarcodina__Sarcodina  characterized by the formation of pseudopods for locomotion and taking food: Actinopoda; Rhizopoda
              member of:  phylum_Protozoa__Protozoa  in some classifications considered a superphylum or a subkingdom; comprises flagellates; ciliates; sporozoans; amoebas; foraminifers
                 member of:  kingdom_Protoctista__Protoctista  in most modern classifications, replacement for the Protista; includes: Protozoa; Euglenophyta; Chlorophyta; Cryptophyta; Heterokontophyta; Rhodophyta; unicellular protists and their descendant multicellular organisms: regarded as distinct from plants and animals

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