FB2024_03 , released June 25, 2024
FB2024_03 , released June 25, 2024
CV Term Report
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General Information
Term photoreceptor cell R3 ID (Ontology) FBbt:00004217 (Fly Anatomy)
Definition Outer photoreceptor cell of the adult eye whose rhabdomere is located at the non-right angled vertex of the longer of two parallel sides of the trapezoid of rhabdomeres in each ommatidium. It has a single axon that projects along a single lamina optic cartridge (Fischbach and Dittrich, 1989; Wolff and Ready, 1993).[ FlyBase:FBrf0049410 FlyBase:FBrf0064798 FlyBase:FBrf0216925 ]
Also Known As "lamina receptor cell R3" ; "R3"
Comment The name photoreceptor cell R3 is occasionally, mistakenly assumed to refer to any Rh3 expressing photoreceptor cell. This is incorrect. This term only refers to a type of adult eye photoreceptor cell. The name is based simply on the position of the cell and its rhabdomere within each ommatidium - see figure 4 in Wolff and Ready, 1993. Cell connectivity was determined by analysis of semi-automated EM reconstruction of 749 serial sections of 21 complete lamina cartridges. The number of synaptic connections for R3 (presynaptic/postsynaptic) in a single lamina cartridge with each cell type was the following: L1 (37/-), L2 (39/-), L3 (4/-), L4 (-/3), Lai (39/-), T1 (2/-), C3 (2/1), Lawf (-/1) and epithelial glia (7/-) (Rivera-Alba et al., 2011).
Links to Extrernal Ontologies
VFB:FBbt_00004217
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     148
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION      35
Insertions (FBti)  PHENOTYPE_MANIFEST_IN      24
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN      49
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
 photoreceptor cell R3 (all annotations which use CV term, excluding "NOT" statements)     154     22     57     56
     photoreceptor cell R3 | cell non-autonomous | somatic clone       1       --       --       --
     photoreceptor cell R3 | cell non-autonomous | third instar larval stage       3       --       --       2
     photoreceptor cell R3 | ectopic      17       --       1     12
     photoreceptor cell R3 | ectopic | precursor       1       --       1       --
     photoreceptor cell R3 | ectopic | somatic clone       1       --       --       --
     photoreceptor cell R3 | heat sensitive       2       --       --       1
     photoreceptor cell R3 | increased number       5       --       --       3
     photoreceptor cell R3 | larval stage | somatic clone       2       --       1       --
     photoreceptor cell R3 | precursor | somatic clone       2       --       1       --
     photoreceptor cell R3 | somatic clone      28       --       8      4
     photoreceptor cell R3 | somatic clone | increased number       1       --       --       --
     photoreceptor cell R3 | somatic clone | third instar larval stage       2       --       --       --
     photoreceptor cell R3 | third instar larval stage       3       --       1       --
Spanning Tree (Parents/Children)
Only view relationship:
  eye photoreceptor cell
   |__outer photoreceptor cell
       |__photoreceptor cell R3  336 rec.
           |__photoreceptor cell R3 pigment granule
           |__photoreceptor cell R3 stalk 2 rec.
           |__rhabdomere R3 60 rec.
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Is a outer photoreceptor cell
Develops from photoreceptor R3 precursor cell
Part of
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Synonyms
  • "lamina receptor cell R3" EXACT
    "R3" EXACT VFB_SYMBOL[ FlyBase:FBrf0247762 ]
    "receptor cell R3" RELATED
Secondary IDs
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VFB:FBbt_00004217