AMOEBOID PROTOZOA (2 phyla)
1. Phylum RHIZOPODA (5 classes)
1. Class Lobosea (Amoeba; Entamoeba; Difflugia). Lobopodia present.
2. Class Heteroblastea (Naegleria; Vahlkampfia). Naked amoebas with flagellated stage.
3. Class Karyoblastea (=Pelobiontea) (Pelomyxa). Naked, multinucleated amoebas without flagellated stages.
4. Class Filosea (Vampyrella; Gromia; Euglypha). With filopodia.
5. Class Granuloreticulosea (Globigerina; Elphidium). With granular reticulopodia.
2. Phylum ACTINOPODA (4 Classes)
1. Class Acantharea (Acanthometra). Radiolarians with radiating skeleton of strontium sulfate.
2. Class Polycystinea (Collozoum; Sphaeozoum). Radiolarians with siliceous skeleton.
3. Class Phaeodarea (Radiolarians; Aulacantha). Radiolarians with siliceous skeleton but capsular membrane with three large pores.
4. Class Heliozoea (Actinophrys; Camptonema). Naked with actinopodia.
SPORE-FORMING PROTOZOA (3 phyla)
1. Phylum APICOMPLEXA (=SPOROZOA)
1. Class Gregarinaea (Monocystis). Extracellular parasites of annelids and arthropods that move by gregarine movement.
2. Class Coccidea (Plasmodium; Toxoplasma; Eimeria). Trophozoites small and intracellular.
3. Class Piroplasmea (Babesia; Theileria). Parasites of cattle RBCs transmitted by ticks.
2. Phylum MICROSPORA (Nosema). Insect parasites having spores with a polar filament.
3. Phylum MYXOSPORIDIA (Myxidium; Ceratomyxa). Amoeboid, multinucleate fish parasites with polar filament encased in 2-3 valves.
CILIATED PROTOZOA (1 phylum)
1. Phylum CILIOPHORA (3 Classes)
1. Class KINETOFRAGMINOPHORA, Kineties in oral region of body.
Subclass Gymnostomata (ex. Didinium).
Subclass Vestibulifera (ex. Balantidium).
Subclass Hypostomata (ex. Hypocoma).
Subclass Suctoria (ex. Ephelota; Podophrya).
2. Class OLIGOHYMENOPHORA, Oral apparatus well-developed.
Subclass Hymenostomata (ex. Paramecium; Tetrahymena).
Subclass Peritricha (ex. Vorticella; Trichodina).
3. Class POLYHYMENOPHORA, Oral region with zone of buccal membranelles. Body cilia uniform.
Subclass Spirotricha (ex. Stentor; Bursaria; Halteria).
MODIFIED SLEIGH’S SYSTEM(by A. Pechenik, 2002)
Kingdom PROTOZOA (14 phyla)
1. Phylum CILIOPHORA (ciliates).
2. Phylum AMOEBOZOA (Amoebas).
3. Phylum RADIOZOA (radiolarians).
4. Phylum HELIOZOA (sun animalcules).
FLAGELLATED PROTOZOA
5. Phylum TRICHOZOA (Trichomonas).
6. Phylum EUGLENOZOA (Euglena).
7. Phylum DINOZOA (Dinoflagellates).
8. Phylum CHOANOZOA (Choanoflagellates).
9. Phylum METAMONADA (Giardia).
SPORE-FORMING PROTOZOA
10. Phylum APICOMPLEXA (=SPOROZA), includes three subphyla.
HONORARY PROTOZOA
11. Phylum LABYRINTHOMORPHA (Slime-nets).
12. Phylum OPALOZOA (Opalina).
13. Phylum MICROSPORIDEA (now transferred to fungi).
14. Phylum MYXOZOA (now shifted to kingdom Animalia).
Kingdom CHROMISTA, Slime-nets (Labyrinthomorpha) and Opalina (Opalinata) have been brought under this new kingdom.
HONIGBERG SYSTEM OF CLASSIFICATION OF PROTOZOA
(By Honigberg et al. 1964)
Phylum PROTOZOA (=ANIMAL PROTISTA)
1. Subphylum SARCOMASTIGOPHORA
A. Superclass MASTIGOPHORA
1. Class Phytomastigophorea (Phytoflagellates), Euglena, Volvox, Noctiluca.
2. Class Zoomastigophorea (Zooflagellates), Leishmania, Trypanosoma.
B. Superclass OPALINATA (Opalina, Pro-opalina, Zelleriella, Cepedea).
C. Superclass SARCODINA (=RHOZOPODA)
1. Class Actinopodea
Subclass Heliozoia (Actinophrys).
Subclass Radiolaria (Collozoum).
Subclass Acantharia (Acanthometra).
Subclass Proteomyxidia (Vampyrella).
2. Class Pyroplasmea (Babesia)
3. Class Rhizopodea
Subclass Lobosia (Amoeba; Arcella; Difflugia; Euglypha).
Subclass Filosia (Allogromia; Gromia; Penardia).
Subclass Granuloreticulosia (Elphidium; Globigerina).
2. Subphylum CNIDOSPORA
1. Class Myxosporidea (Myxidium; Ceratomyxa).
2. Class Microsporidea (Nosema).
3. Subphylum SPOROZOA
1. Class Telosporea
Subclass Gregarinea (Monocystis; Gregarina).
Subclass Coccidia (Plasmodium).
2. Class Toxoplasmea (Toxoplasma gondii).
3. Class Haplosporea (Haplosporidium; Ichthyosporidium).
4. Subphylum CILIOPHORA
1. Class Ciliata (=Infusoria)
Subclass Holotrichia (Paramecium; Balantidium; Didinum).
Subclass Peritrichia (Vorticella).
Subclass Suctoria (Ephelota; Podophrya).
Subclass Spirotrichia (Stentor; Bursaria; Halteria).