FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term cilium ID (Ontology) GO:0005929 (Gene Ontology)
Definition A specialized eukaryotic organelle that consists of a filiform extrusion of the cell surface and of some cytoplasmic parts. Each cilium is largely bounded by an extrusion of the cytoplasmic (plasma) membrane, and contains a regular longitudinal array of microtubules, anchored to a basal body.[ ISBN:0198547684 PubMed:16824949 PubMed:17009929 PubMed:20144998 ]
Also Known As"eukaryotic flagellum" ; "microtubule-based flagellum"
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Direct annotations: records annotated with this exact term (child terms are NOT included)
Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Genes (FBgn)GO_CELLULAR_COMPONENT
Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
Constructs (FBtp)PHENOTYPE_MANIFEST_IN
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 Full annotation statements 
Relevant FlyBase reports
 Alleles Gene Groups Genes Insertions Constructs
 cilium (all annotations which use CV term, excluding "NOT" statements)
     cilium | absent | larval stage
      --       --       --       --
     cilium | adult stage
      --       --       --
     cilium | adult stage | decreased number
      --       --       --       --
     cilium | spermatogenesis
      --       --       --
     colocalizes_with | cilium       --       --
      --       --
     is_active_in | cilium       --       --
      --       --
     located_in | cilium       --       --
      --       --
 NOT | located_in | cilium       --       --
      --       --
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cell projection
 |__plasma membrane bounded cell projection__
organelle                                    |
 |__membrane-bounded organelle_______________|
                                             cilium  333 rec.
                                              |__BBSome 7 rec.
                                              |__centriolar subdistal appendage
                                              |__ciliary basal body 81 rec.
                                              |   |__kinociliary basal body
                                              |   |__left anterior basal body
                                              |   |__left caudal basal body
                                              |   |__left posteriolateral basal body
                                              |   |__left ventral basal body
                                              |   |__right anterior basal body
                                              |   |__right caudal basal body
                                              |   |__right posteriolateral basal body
                                              |   |__right ventral basal body
                                              |__ciliary base 9 rec.
                                              |__ciliary cap 9 rec.
                                              |__ciliary inversin compartment
                                              |__ciliary membrane 6 rec.
                                              |   |__ciliary necklace
                                              |   |__ciliary pocket membrane
                                              |   |__cone photoreceptor disc membrane
                                              |   |__non-motile cilium membrane
                                              |   |__photoreceptor outer segment membrane
                                              |__ciliary microtubule quartet
                                              |__ciliary plasm 135 rec.
                                              |   |__axoneme(+) 133 rec.
                                              |__ciliary pocket
                                              |   |__ciliary centrin arm
                                              |   |__ciliary pocket collar
                                              |   |__ciliary pocket membrane
                                              |__ciliary rootlet 11 rec.
                                              |__ciliary shaft
                                              |__ciliary tip 1 rec.
                                              |__ciliary transition fiber 3 rec.
                                              |__ciliary transition zone 26 rec.
                                              |   |__central cylinder
                                              |   |__ciliary necklace
                                              |   |__MKS complex 7 rec.
                                              |   |__NPHP complex
                                              |   |__photoreceptor connecting cilium(+) 1 rec.
                                              |   |__Y-shaped link
                                              |__motile cilium 70 rec.
                                              |   |__9+0 motile cilium
                                              |   |__9+2 motile cilium(+) 52 rec.
                                              |   |__mastigoneme
                                              |__non-motile cilium 20 rec.
                                              |   |__9+0 non-motile cilium(+) 10 rec.
                                              |   |__9+2 non-motile cilium(+)
                                              |   |__non-motile cilium membrane
                                              |__ring centriole 2 rec.
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Is a membrane-bounded organelle
plasma membrane bounded cell projection
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Synonyms
  • "eukaryotic flagellum" EXACT
    "flagellum" RELATED
    "microtubule-based flagellum" EXACT
    "primary cilium" NARROW
Secondary IDs
hide External Crossreferences & Linkouts
FMA:67181
NIF_Subcellular:sao787716553
Wikipedia:Cilium