Geleiidae  Geleiidae is a family of karyorelict ciliates. It is sometimes synonymized with family Aveliidae. Geleiidae are very large ciliates (200-5000 µm), with a cylindrical shape, and a thinner, often beak-shaped, apical region. They are characterized by a ventral oral region, with buccal infraciliature organized into one intrabuccal kinety and an extrabuccal row. The family name is based on "Geleia", the type genus.