FB2026_03 , released September 17, 2026
CV Term Report
Help Close All Open All
General Information
Term photoreceptor cell R7 ID (Ontology) FBbt:00004225 (Fly Anatomy)
Definition Inner photoreceptor cell of the ommatidium whose rhabdomere is located distally, directly above that of R8 (Wernet and Desplan, 2004). It has a single axon that extends through a single column of the lamina without making synapses (Fischbach and Dittrich, 1989). This axon crosses the first optic chiasm and extends through a single column of the medulla where it makes pre-synaptic contacts, mainly in medulla layers M1 and M5 (Takemura et al., 2008), before terminating in M6 (Gao et al., 2008; Sancer et al., 2019). It forms reciprocal inhibitory histaminergic synapses with the R8 photoreceptor of the same optic column (Schnaitmann et al., 2018), with a large proportion in the first optic chiasm (Kind et al., 2021).[ FlyBase:FBrf0049410 FlyBase:FBrf0064798 FlyBase:FBrf0205531 FlyBase:FBrf0206213 FlyBase:FBrf0224070 FlyBase:FBrf0237706 FlyBase:FBrf0252485 ]
Also Known As"lamina receptor cell R7" ; "R7"
CommentThis term refers to a type of adult eye photoreceptor cell, defined based on the position of its rhabdomere within each ommatidium - see figure 4 in Wolff and Ready (1993). It does not refer to Rh7-expressing photoreceptors.
Links to External Ontologies
VFB:FBbt_00004225
Annotations
Records annotated with this term OR any of its CHILD TERMS

Choose a record type to view annotations for this term and its child terms. Direct annotations and full annotation statements below also provide HitList buttons.

  • Results list data from multiple species. Choose a record type above to open its HitList.
Direct annotations: records annotated with this exact term (child terms are NOT included)
Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
Insertions (FBti)PHENOTYPE_MANIFEST_IN
Constructs (FBtp)PHENOTYPE_MANIFEST_IN
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 Split System Combinations Genes Images  Insertions Constructs
 photoreceptor cell R7 (all annotations which use CV term, excluding "NOT" statements)
     photoreceptor cell R7 | absent
      --       --       --       --       --       --
     photoreceptor cell R7 | adult stage
      --       --       --       --
     photoreceptor cell R7 | adult stage | decreased number
      --       --       --       --       --       --
     photoreceptor cell R7 | adult stage | increased number
      --       --       --       --
     photoreceptor cell R7 | adult stage | somatic clone
      --       --       --       --
     photoreceptor cell R7 | adult stage | somatic clone - tissue specific
      --       --       --       --       --       --
     photoreceptor cell R7 | cell autonomous | somatic clone
      --       --       --       --       --
     photoreceptor cell R7 | cell non-autonomous | somatic clone
      --       --       --       --       --       --
     photoreceptor cell R7 | cell non-autonomous | somatic clone | third instar larval stage
      --       --       --       --       --       --
     photoreceptor cell R7 | decreased number | larval stage
      --       --       --       --       --       --
     photoreceptor cell R7 | decreased number | larval stage | somatic clone - tissue specific
      --       --       --       --       --       --
     photoreceptor cell R7 | ectopic
      --       --       --       --
     photoreceptor cell R7 | ectopic | maternal effect
      --       --       --       --       --       --
     photoreceptor cell R7 | ectopic | somatic clone
      --       --       --       --       --       --
     photoreceptor cell R7 | heat sensitive
      --       --       --       --       --
     photoreceptor cell R7 | increased number
      --       --       --       --       --
     photoreceptor cell R7 | increased number | heat sensitive
      --       --       --       --       --
     photoreceptor cell R7 | increased number | third instar larval stage
      --       --       --       --       --
     photoreceptor cell R7 | larval stage
      --       --       --       --       --
     photoreceptor cell R7 | larval stage | increased number
      --       --       --       --       --
     photoreceptor cell R7 | larval stage | somatic clone
      --       --       --       --       --
     photoreceptor cell R7 | maternal effect
      --       --       --       --       --       --
     photoreceptor cell R7 | nutrition conditional
      --       --       --       --       --
     photoreceptor cell R7 | P-stage
      --       --       --       --
     photoreceptor cell R7 | prepupal stage
      --       --       --       --       --
     photoreceptor cell R7 | pupal stage
      --       --       --       --       --
     photoreceptor cell R7 | pupal stage | increased number
      --       --       --       --       --       --
     photoreceptor cell R7 | pupal stage | somatic clone
      --       --       --       --       --
     photoreceptor cell R7 | somatic clone
      --       --       --       --
     photoreceptor cell R7 | somatic clone | increased number
      --       --       --       --       --
     photoreceptor cell R7 | somatic clone | increased number | third instar larval stage
      --       --       --       --       --       --
     photoreceptor cell R7 | somatic clone | third instar larval stage
      --       --       --       --       --       --
     photoreceptor cell R7 | third instar larval stage
      --       --       --       --
Spanning Tree (Parents/Children)
Only view relationship:
Vocabulary search
  eye photoreceptor cell
   |__inner photoreceptor cell
       |__photoreceptor cell R7  907 rec.
           |__dorsal margin photoreceptor cell R7 13 rec.
           |__photoreceptor cell R7 of pale ommatidium 18 rec.
           |__photoreceptor cell R7 of yellow ommatidium 23 rec.
           |__photoreceptor cell R7 pigment granule
           |__photoreceptor cell R7 stalk 2 rec.
           |__rhabdomere R7 91 rec.
Spanning Tree View Settings
Parents/Children
View Depth
Show hierarchy levels: for parents, for children
hide Relationships
Is a inner photoreceptor cell
Develops from photoreceptor R7 precursor cell
Part of
hide Synonyms & Secondary IDs
Synonyms
  • "lamina receptor cell R7" EXACT
    "R7" EXACT VFB_SYMBOL[ FlyBase:FBrf0247762 ]
    "receptor cell R7" RELATED
Secondary IDs
hide External Crossreferences & Linkouts
CL:0000707
FlyBrain_NDB:10112
VFB:FBbt_00004225