PROTOZOA: Representative species
Phylum Ciliophora
Class Ciliatea
Order Heterotrichida
Family Spirostomidae
Genus Nyctotherus
Class Oligohymenophorea
Order Peritrichida
Family Trichodinidae
Genus Trichodina
Phylum Metamonada
Class Flagellata
Order Trichomonidad
Family Trichomonadidae
Genus Tritrichomonas
Phylum Sarcomastigophora
Class Lobosa
Order Amoebida
Family Entamoebidae
Genus Entamoeba
Class Opalinea
Order Opalinida
Family Opalinidae
Genus Opalina
Phylum Ciliophora
Class Ciliatea
Order Heterotrichida
Family Spirostomidae
Genus Nyctotherus
Class Oligohymenophorea
Order Peritrichida
Family Trichodinidae
Genus Trichodina
Phylum Metamonada
Class Flagellata
Order Trichomonidad
Family Trichomonadidae
Genus Tritrichomonas
Phylum Sarcomastigophora
Class Lobosa
Order Amoebida
Family Entamoebidae
Genus Entamoeba
Class Opalinea
Order Opalinida
Family Opalinidae
Genus Opalina