FB2026_03 , released September 17, 2026
FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term eye photoreceptor cell ID (Ontology) FBbt:00006009 (Fly Anatomy)
Definition Photoreceptor cell that forms the core of each ommatidium in the adult eye. Eight of these photoreceptors are arranged in each ommatidial core, bundled like the staves of a barrel. Each has a photosensitive rhabdomere that projects into the barrel cavity and adjacent supporting membrane, the stalk (Wolff and Ready, 1993). Each extends an axon into the optic lobe. Activation of the photoreceptor by light results in depolarization and in histamine release at the synapses of these axons (Sarthy, 1991).[ FlyBase:FBrf0054495 FlyBase:FBrf0064798 ]
Also Known As "lamina receptor cell" ; "retinula cell"
Comment Note - eyelet photoreceptors are NOT sub-types.
Links to External Ontologies
VFB:FBbt_00006009
Annotations
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
Insertions (FBti)PHENOTYPE_MANIFEST_IN
Constructs (FBtp)PHENOTYPE_MANIFEST_IN
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 Full annotation statements 
Relevant FlyBase reports
 Alleles Split System Combinations Genes Insertions Constructs
 eye photoreceptor cell (all annotations which use CV term, excluding "NOT" statements)
     eye photoreceptor cell | adult stage
      --       --
     eye photoreceptor cell | adult stage | cell autonomous
      --       --       --
     eye photoreceptor cell | adult stage | cell autonomous | somatic clone | conditional
      --       --
      --
     eye photoreceptor cell | adult stage | decreased number
      --       --       --
     eye photoreceptor cell | adult stage | decreased number | somatic clone - tissue specific
      --       --
      --
     eye photoreceptor cell | adult stage | increased number
      --       --
     eye photoreceptor cell | adult stage | increased number | somatic clone
      --       --
      --
     eye photoreceptor cell | adult stage | light conditional
      --       --
      --
     eye photoreceptor cell | adult stage | progressive
      --       --       --
     eye photoreceptor cell | adult stage | progressive | somatic clone
      --       --
      --
     eye photoreceptor cell | adult stage | progressive | somatic clone | conditional
      --       --       --       --
     eye photoreceptor cell | adult stage | somatic clone
      --       --       --
     eye photoreceptor cell | adult stage | somatic clone - tissue specific
      --       --
     eye photoreceptor cell | adult stage | somatic clone | conditional
      --       --       --       --
     eye photoreceptor cell | cell autonomous | progressive | somatic clone
      --       --       --       --
     eye photoreceptor cell | cell autonomous | somatic clone
      --       --
      --
     eye photoreceptor cell | cell non-autonomous
      --       --       --       --
     eye photoreceptor cell | cell non-autonomous | ectopic | somatic clone
      --       --       --       --
     eye photoreceptor cell | cell non-autonomous | somatic clone
      --       --       --
     eye photoreceptor cell | cell non-autonomous | somatic clone | increased number
      --       --       --       --
     eye photoreceptor cell | conditional
      --       --       --
     eye photoreceptor cell | conditional | somatic clone
      --       --       --       --
     eye photoreceptor cell | decreased number
      --       --
     eye photoreceptor cell | decreased number | larval stage
      --       --       --       --
     eye photoreceptor cell | decreased number | larval stage | somatic clone - tissue specific
      --       --       --       --
     eye photoreceptor cell | decreased number | somatic clone
      --       --       --
     eye photoreceptor cell | drug conditional
      --       --       --
     eye photoreceptor cell | ectopic
      --       --
     eye photoreceptor cell | ectopic | larval stage
      --       --       --
     eye photoreceptor cell | ectopic | somatic clone
      --       --       --
     eye photoreceptor cell | heat sensitive
      --       --       --
     eye photoreceptor cell | increased number
      --       --
     eye photoreceptor cell | increased number | larval stage
      --       --       --
     eye photoreceptor cell | larval stage
      --       --       --
     eye photoreceptor cell | maternal effect
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     eye photoreceptor cell | P-stage
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     eye photoreceptor cell | P-stage | ectopic
      --       --       --
     eye photoreceptor cell | P-stage | ectopic | somatic clone
      --       --       --       --
     eye photoreceptor cell | P-stage | heat sensitive
      --       --       --
     eye photoreceptor cell | P-stage | somatic clone - tissue specific
      --       --
     eye photoreceptor cell | progressive
      --       --
     eye photoreceptor cell | progressive | somatic clone
      --       --       --       --
     eye photoreceptor cell | pupal stage
      --       --
     eye photoreceptor cell | pupal stage | increased number
      --       --       --       --
     eye photoreceptor cell | pupal stage | somatic clone
      --       --       --       --
     eye photoreceptor cell | somatic clone
      --       --
     eye photoreceptor cell | somatic clone - Minute background
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     eye photoreceptor cell | somatic clone | conditional
      --       --
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     eye photoreceptor cell | somatic clone | drug conditional
      --       --       --       --
     eye photoreceptor cell | somatic clone | heat sensitive
      --       --       --       --
     eye photoreceptor cell | somatic clone | increased number
      --       --       --
     eye photoreceptor cell | somatic clone | increased number | wandering third instar larval stage
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     eye photoreceptor cell | somatic clone | third instar larval stage
      --       --       --
     eye photoreceptor cell | somatic clone | third instar larval stage L2
      --       --       --       --
     eye photoreceptor cell | somatic clone | third instar larval stage L2 | heat sensitive
      --       --       --       --
     eye photoreceptor cell | somatic clone | wandering third instar larval stage
      --       --       --       --
     eye photoreceptor cell | temperature conditional
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     eye photoreceptor cell | third instar larval stage
      --       --
     eye photoreceptor cell | third instar larval stage L2
      --       --       --
     eye photoreceptor cell | wandering third instar larval stage
      --       --       --
Spanning Tree (Parents/Children)
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Vocabulary search
retina
 |__ommatidium______________________
light-sensitive neuron              |
 |__rhabdomeric photoreceptor cell__|
sensory neuron                      |
 |__adult sensory neuron____________|
photoreceptor                       |
 |__ommatidium______________________|
external sensillum                  |
 |__ommatidium______________________|
adult head sensillum                |
 |__ommatidium______________________|
histaminergic neuron                |
 |__adult histaminergic neuron______|
adult neuron                        |
 |__adult sensory neuron____________|
 |__adult PNS neuron________________|
adult aminergic neuron              |
 |__adult histaminergic neuron______|
PNS neuron                          |
 |__adult PNS neuron________________|
somatic cell                        |
 |__sensory organ cell______________|
                                    eye photoreceptor cell  2909 rec.
                                     |__dorsal margin photoreceptor cell 52 rec.
                                     |   |__dorsal margin photoreceptor cell R7 13 rec.
                                     |   |__dorsal margin photoreceptor cell R8 16 rec.
                                     |__eye photoreceptor cell stalk 80 rec.
                                     |   |__photoreceptor cell R1 stalk 1 rec.
                                     |   |__photoreceptor cell R2 stalk 1 rec.
                                     |   |__photoreceptor cell R3 stalk 2 rec.
                                     |   |__photoreceptor cell R4 stalk 1 rec.
                                     |   |__photoreceptor cell R5 stalk 2 rec.
                                     |   |__photoreceptor cell R6 stalk 1 rec.
                                     |   |__photoreceptor cell R7 stalk 2 rec.
                                     |   |__photoreceptor cell R8 stalk 20 rec.
                                     |__inner photoreceptor cell 1242 rec.
                                     |   |__photoreceptor cell R7(+) 907 rec.
                                     |   |__photoreceptor cell R8(+) 527 rec.
                                     |__outer photoreceptor cell 605 rec.
                                     |   |__photoreceptor cell R1(+) 296 rec.
                                     |   |__photoreceptor cell R2(+) 246 rec.
                                     |   |__photoreceptor cell R3(+) 334 rec.
                                     |   |__photoreceptor cell R4(+) 355 rec.
                                     |   |__photoreceptor cell R5(+) 250 rec.
                                     |   |__photoreceptor cell R6(+) 280 rec.
                                     |__rhabdomere of eye photoreceptor cell 403 rec.
                                         |__rhabdomere R1 51 rec.
                                         |__rhabdomere R2 59 rec.
                                         |__rhabdomere R3 60 rec.
                                         |__rhabdomere R4 60 rec.
                                         |__rhabdomere R5 57 rec.
                                         |__rhabdomere R6 52 rec.
                                         |__rhabdomere R7 91 rec.
                                         |__rhabdomere R8 17 rec.
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Is a sensory organ cell
rhabdomeric photoreceptor cell
adult histaminergic neuron
adult sensory neuron
adult PNS neuron
Develops from eye photoreceptor precursor cell
Part of ommatidium
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Synonyms
Secondary IDs
hide External Crossreferences & Linkouts
CL:2000019
VFB:FBbt_00006009