FB2026_03 , released September 17, 2026
CV Term Report
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Term tonofibrilla ID (Ontology) FBbt:00005092 (Fly Anatomy)
Definition Attachment fibers that are embedded in the cuticle, and attach the tendon cells to it. Tonofibrils are closely associated with hemidesmosomes found in the external, apical face of the tendon cell that abuts the cuticle. Tonofibrils are made up of dense extracellular material.[ FlyBase:FBrf0064665 FlyBase:FBrf0064793 ]
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Alleles (FBal)PHENOTYPE_MANIFEST_IN
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 tonofibrilla (all annotations which use CV term, excluding "NOT" statements)
     tonofibrilla | wandering third instar larval stage
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organ system
 |__muscle system___________________
anatomical structure                |
 |__acellular anatomical structure__|
                                    tonofibrilla  1 rec.
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Is a acellular anatomical structure
Part of muscle system
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