A General Section Morphology and Principal Terms Life Cycle Parasitism Collecting, Culturing, Observing and Staining of Spathidiid Ciliates B Systematic section How to Describe a Ciliate? Species/ Subspecies Concept How to Use the Monograph? Key to Families Family Protospathidiidae nov. fam. (14 species) Genus Edaphospathula nov. gen. (7 species) Genus Protospathidium (7 species) Family Arcuospathidiidae nov. fam. (27 species) Genus Arcuospathidium (13 species) Genus Cultellothrix (7 species) Genus Armatospathula nov. gen. (4 species) Genus Spathidiodes (3 species) Family Apertospathulidae (14 species) Genus Apertospathula (9 species) Genus Longispatha (2 species) Genus Rhinothrix (3 species) References Systematic Index Micrographs