The paleas are shorter than the lemmas, with glabrous backs and ciliate keels. The calyx is small, four-lobed, imbricate in the bud, acute, margins ciliate, persistent. Zoothamnium is a genus of ciliate protozoan. The linear leaflets are ciliate and petiolate. The flowers are in groups, supported by two large foliage-like, narrow, ciliate bracts. The ciliate protozoan "Orchitophrya stellarum" is sometimes a parasite of the common starfish. The corolla is bell-shaped, with five deep lobes slightly ciliate. The ridges of the locules are pale orange or lighter and ciliate (having hairlike projections). The spirotrichs are a large and diverse group of ciliate protozoa. The leaf margins are ciliate with scapes long. Chilodonella uncinata is a single-celled organism of the ciliate class of alveoles. The term was first used for ciliate protozoans such as "Tetrahymena". Familiar examples of protists with a pellicle are the euglenoids and the ciliate "Paramecium". Balantidium coli is a parasitic species of ciliate alveolates that causes the disease balantidiasis. The petals are ciliate or adorned with lateral wings.