Kingdom Protista (Haeckel, 1866) - protists Phylum Ciliophora Doflein, 1901 - ciliates Class Oligohymenophorea de Puytorac et al., 1974 - oligohymenophoreans Subclass Peritricha Stein, 1859 - peritrichs see Subclass Peritrichia Stein, 1859 Genus Urceolaria Stein, 1854