FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
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
Records annotated with this term OR any of its CHILD TERMS
Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records
Alleles (FBal)  PHENOTYPE_MANIFEST_IN     902
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       5
Insertions (FBti)  PHENOTYPE_MANIFEST_IN     122
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN     413
show Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
 Full annotation statements 
Relevant FlyBase reports
 Alleles  Genes Insertions Constructs
 eye photoreceptor cell (all annotations which use CV term, excluding "NOT" statements)     902      3     22    126    457
     eye photoreceptor cell | adult stage      54       --       --       1     44
     eye photoreceptor cell | adult stage | cell autonomous       2       --       --       --       2
     eye photoreceptor cell | adult stage | cell autonomous | somatic clone | conditional       1       --       --       1       --
     eye photoreceptor cell | adult stage | decreased number      22       --       --       --      17
     eye photoreceptor cell | adult stage | decreased number | somatic clone - tissue specific       1       --       --       1       --
     eye photoreceptor cell | adult stage | increased number       8       --       --       3      5
     eye photoreceptor cell | adult stage | increased number | somatic clone       1       --       --       1       --
     eye photoreceptor cell | adult stage | light conditional       2       --       --       2       --
     eye photoreceptor cell | adult stage | progressive       8       --       --       --       7
     eye photoreceptor cell | adult stage | progressive | somatic clone       8       --       --       1       --
     eye photoreceptor cell | adult stage | progressive | somatic clone | conditional       4       --       --       --       --
     eye photoreceptor cell | adult stage | somatic clone      14       --       --       --       2
     eye photoreceptor cell | adult stage | somatic clone - tissue specific       9       --       --       3      4
     eye photoreceptor cell | adult stage | somatic clone | conditional       3       --       --       --       --
     eye photoreceptor cell | cell autonomous | progressive | somatic clone       1       --       --       --       --
     eye photoreceptor cell | cell autonomous | somatic clone       3       --       --       2       --
     eye photoreceptor cell | cell non-autonomous       1       --       --       --       --
     eye photoreceptor cell | cell non-autonomous | ectopic | somatic clone       2       --       --       --       --
     eye photoreceptor cell | cell non-autonomous | somatic clone       4       --       --       --       2
     eye photoreceptor cell | cell non-autonomous | somatic clone | increased number       1       --       --       --       --
     eye photoreceptor cell | conditional      11       --       --       --       6
     eye photoreceptor cell | conditional | somatic clone       1       --       --       --       --
     eye photoreceptor cell | decreased number      11       --       --       1      8
     eye photoreceptor cell | decreased number | larval stage       1       --       --       --       --
     eye photoreceptor cell | decreased number | larval stage | somatic clone - tissue specific       1       --       --       --       --
     eye photoreceptor cell | decreased number | somatic clone       2       --       --       --       1
     eye photoreceptor cell | drug conditional       2       --       --       --       2
     eye photoreceptor cell | ectopic      32       --       --       2     18
     eye photoreceptor cell | ectopic | larval stage       3       --       --       --       3
     eye photoreceptor cell | ectopic | somatic clone       2       --       --       --       1
     eye photoreceptor cell | heat sensitive      14       --       --       --      13
     eye photoreceptor cell | increased number      31       --       --       2      8
     eye photoreceptor cell | increased number | larval stage       1       --       --       --       1
     eye photoreceptor cell | larval stage      10       --       --       --       4
     eye photoreceptor cell | maternal effect       2       --       --       --       --
     eye photoreceptor cell | P-stage      15       --       --       2      7
     eye photoreceptor cell | P-stage | ectopic       2       --       --       --       4
     eye photoreceptor cell | P-stage | ectopic | somatic clone       1       --       --       --       --
     eye photoreceptor cell | P-stage | heat sensitive       2       --       --       --       4
     eye photoreceptor cell | P-stage | somatic clone - tissue specific       9       --       --       1      7
     eye photoreceptor cell | progressive      27       --       --       1     22
     eye photoreceptor cell | progressive | somatic clone       4       --       --       --       --
     eye photoreceptor cell | pupal stage       4       --       --       2      1
     eye photoreceptor cell | pupal stage | increased number       2       --       --       --       --
     eye photoreceptor cell | pupal stage | somatic clone       2       --       --       --       --
     eye photoreceptor cell | somatic clone     154       --       --      32     13
     eye photoreceptor cell | somatic clone - Minute background       1       --       --       --       --
     eye photoreceptor cell | somatic clone | conditional       1       --       --       1       --
     eye photoreceptor cell | somatic clone | drug conditional       4       --       --       --       --
     eye photoreceptor cell | somatic clone | heat sensitive       2       --       --       --       --
     eye photoreceptor cell | somatic clone | increased number       5       --       --       --       1
     eye photoreceptor cell | somatic clone | increased number | wandering third instar larval stage       3       --       --       --       --
     eye photoreceptor cell | somatic clone | third instar larval stage      10       --       --       --       4
     eye photoreceptor cell | somatic clone | third instar larval stage L2       2       --       --       --       --
     eye photoreceptor cell | somatic clone | third instar larval stage L2 | heat sensitive       1       --       --       --       --
     eye photoreceptor cell | somatic clone | wandering third instar larval stage       3       --       --       --       --
     eye photoreceptor cell | temperature conditional       2       --       --       --       3
     eye photoreceptor cell | third instar larval stage      38       --       --       2     32
     eye photoreceptor cell | third instar larval stage L2       3       --       --       --       5
     eye photoreceptor cell | wandering third instar larval stage       4       --       --       --       4
Spanning Tree (Parents/Children)
Only view relationship:
photoreceptor neuron
 |__rhabdomeric photoreceptor cell__
sensory neuron                      |
 |__adult sensory neuron____________|
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  2910 rec.
                                     |__dorsal margin photoreceptor cell 52 rec.
                                     |   |__dorsal margin photoreceptor cell R7 13 rec.
                                     |   |__dorsal margin photoreceptor cell R8 16 rec.
                                     |__inner photoreceptor cell 1247 rec.
                                     |   |__photoreceptor cell R7(+) 910 rec.
                                     |   |__photoreceptor cell R8(+) 527 rec.
                                     |__outer photoreceptor cell 607 rec.
                                         |__photoreceptor cell R1 296 rec.
                                         |__photoreceptor cell R2 246 rec.
                                         |__photoreceptor cell R3 336 rec.
                                         |__photoreceptor cell R4 355 rec.
                                         |__photoreceptor cell R5 250 rec.
                                         |__photoreceptor cell R6 280 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