Order: Arcellinida print
- Cellular forms
- Domain: Eukaryota
- Kingdom: Animalia
- Subkingdom: Monocytozoa or Protozoa
- Phyllum: Sarcomastigophora
- Subphyllum: Amoebozoa
- Class: Lobosea
- Order: Arcellinida
- Family: Microcoryciidae
- Family: Arcellidae
- Family: Centropyxidae
- Family: Plagiopyxidae
- Family: Difflugiidae
- Hyalospheniidae
- Nebelidae
- Lesquereusidae
- Phryganellidae
- Cryptodifflugiidae
- Family: Trigonopyxidae