What do all 80000 species of Phylum Ciliophora have in common?

All 80,000 species of Phylum Ciliophora have cilia, which are tiny hair-like structures used for movement and feeding. They also possess a characteristic structure called the oral groove that helps in feeding by sweeping in food particles. Additionally, they have a complex nuclear structure with two types of nuclei: macronucleus and micronucleus.