{{Short description|Order of single-celled organisms}} {{Automatic taxobox | image = Zoothamnium niveum.jpg | image_caption = ''Zoothamnium niveum'' | taxon = Sessilida | authority = Stein, 1833 | subdivision_ranks = Families | subdivision = * Ellobiophryidae * Epistylididae * Lagenophryidae * Operculariidae * Rovinjellidae * Scyphidiidae * Vaginicolidae * Vorticellidae * Zoothamniidae * Ophrydiidae <ref>https://www.fws.gov/species/ophrydium-ophrydium</ref> }}
'''Sessilida''' is the largest order of the peritrich ciliates.<ref>{{Cite journal |last=Wang |first=Zhe |last2=Feng |first2=Xiaoting |last3=Li |first3=Lifang |last4=Al-Rasheid |first4=Khaled A. S. |last5=Warren |first5=Alan |last6=Wang |first6=Chundi |last7=Gu |first7=Zemao |date=2022-11-24 |title=New considerations on the phylogeny of Sessilida (Protista: Ciliophora: Peritrichia) based on multiple-gene information, with emphasis on colonial taxa |url=https://link.springer.com/10.1007/s42995-022-00155-w |journal=Marine Life Science & Technology |language=en |volume=4 |issue=4 |pages=569–583 |doi=10.1007/s42995-022-00155-w |issn=2662-1746 |pmc=10077168 |pmid=37078081}}</ref><ref>{{Cite journal |last=Lu |first=Borong |last2=Hu |first2=Xiaozhong |last3=Warren |first3=Alan |last4=Song |first4=Weibo |last5=Yan |first5=Ying |date=July 2023 |title=From oral structure to molecular evidence: new insights into the evolutionary phylogeny of the ciliate order Sessilida (Protista, Ciliophora), with the establishment of two new families and new contributions to the poorly studied family Vaginicolidae |url=https://link.springer.com/10.1007/s11427-022-2268-2 |journal=Science China Life Sciences |language=en |volume=66 |issue=7 |pages=1535–1553 |doi=10.1007/s11427-022-2268-2 |issn=1674-7305|doi-access=free }}</ref>
== List of families == * Ellobiophryidae * Epistylididae * Lagenophryidae * Operculariidae * Rovinjellidae * Scyphidiidae * Vaginicolidae * Vorticellidae * Zoothamniidae
== References == {{reflist}}
== External links == * {{wikispecies-inline}}
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Category:Oligohymenophorea Category:Ciliate orders
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