geleiidae geleiidae geleiidae is a family of karyorelict ciliates. it is sometimes synonymized with family aveliidae. geleiidae scientific classification domain: eukaryota clade: diaphoretickes clade: sar clade: alveolata phylum: ciliophora subphylum: postciliodesmatophora class: karyorelictea order: protoheterotrichida family: geleiidaekahl, 1933 genera avelia corlissina geleia gellertia parduczia geleiidae are very large ciliates (200 µm to 5 mm), 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.