FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term dorsal margin ommatidium ID (Ontology) FBbt:02000000 (Fly Anatomy)
Definition An ommatidial subtype located in a single row at the dorsal margin of the eye. This ommatidial subtype is specialized to detect the angle of polarized light.[ FlyBase:FBrf0051852 FlyBase:FBrf0180690 ]
Also Known As "dorsal rim ommatidium"
Comment The dorsal margin ommatidium expresses the opsin Rh3 (FBgn0003249) that detects polarized light in both photoreceptor R7 and R8 cells (Fortini and Rubin, 1990).
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VFB:FBbt_02000000
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 dorsal margin ommatidium (all annotations which use CV term, excluding "NOT" statements)       1
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photoreceptor_________
external sensillum____|
adult head sensillum__|
                      ommatidium
                       |__dorsal margin ommatidium  52 rec.
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Is a ommatidium
Part of dorsal rim area
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VFB:FBbt_02000000