vorticellidae vorticellidae vorticellidae is a family of ciliates belonging to the order sessilida. vorticellidae vorticella scientific classification domain: eukaryota clade: diaphoretickes clade: sar clade: alveolata phylum: ciliophora class: oligohymenophorea order: sessilida family: vorticellidaeehrenberg, 1838 genera genera: ruthiella schödel, 1983 systylis bresslau, 1919 vorticella linnaeus, 1767 vorticellides foissner, blake, wolf, breiner & stoeck, 2009