Kingdom Protista (Haeckel, 1866) - protists Phylum Ciliophora Doflein, 1901 - ciliates Class Kinetofragminophorea - kinetofragminophoreans see Phylum Ciliophora Doflein, 1901 Subclass Hypostomatia - hypostome ciliates see Subphylum Intramacronucleata Lynn, 1996 Genus Microthorax Engelmann, 1862