FB2026_03 , released September 17, 2026
CV Term Report
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Term early ommatidial precursor cluster ID (Ontology) FBbt:00007144 (Fly Anatomy)
Definition An ommatidial precursor cluster containing five photoreceptor precursor cells (R2-5 and R8) and 1-2 mystery cells. The definitive five-cell ommatidial precluster is formed when these mystery cells are expelled from this structure and join the surrounding undifferentiated epithelium.[ FlyBase:FBrf0064798 ]
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primordium______________________________________
eye disc posterior to the morphogenetic furrow__|
                                                ommatidial precursor cluster
                                                 |__early ommatidial precursor cluster  33 rec.
                                                     |__mystery cell 32 rec.
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