FB2026_03 , released September 17, 2026
FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term lamina wide-field 1 neuron ID (Ontology) FBbt:00003741 (Fly Anatomy)
Definition A lamina wide-field neuron that has a main projection that ascends via the first optic chiasm into the lamina where it is restricted to a single column for most of its length before making wide-field arborizations in the distal lamina. These neurons also arborize on the distal surface of the medulla in a circular field of about 20 columns. Several linking fibers from this arborization descend into M4 where they form a wide arborization field covering about 30-40 columns (Fischbach and Dittrich, 1989; Morante and Desplan, 2008). In the lamina, it forms numerous presynaptic connections to lamina monopolar neuron L3 and lamina intrinsic (amacrine) neuron (Rivera-Alba et al., 2011).[ FlyBase:FBrf0049410 FlyBase:FBrf0204652 FlyBase:FBrf0216925 ]
Also Known As "Lawf" ; "LaWF1" ; "Lawf1"
Comment Pre-synaptic terminals were assessed by labelling with a UAS-Synaptotagmin reporter (P\{UAS-HA-syt\} - FBtp0015803). The identification of dendrites and axons was done using a UAS-Dscam (P\{UAS-Dscam.exon17.1.GFP\} - FBtp0021447) or a UAS-tau (P\{UAS-tau-lacZ.O\} - FBtp0010033) reporter, respectively (Morante and Desplan, 2008). Cell connectivity in the lamina was determined by analysis of semi-automated EM reconstruction of 749 serial sections of 21 complete lamina cartridges. The number of synaptic connections for Lawf (presynaptic/postsynaptic) in a single lamina cartridge with each cell type was the following: R1 (1/1), R2 (3/-), R3 (1/-), R6 (1/-), L1 (1/-), L2 (7/-), L3 (17/-), L5 (1/-), Lai (24/-), T1 (1/-), C2 (3/-), C3 (2/-), Lawf collaterals (5) and epithelial glia (6/-) (Rivera-Alba et al., 2011).
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VFB:FBbt_00003741
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
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 lamina wide-field 1 neuron (all annotations which use CV term, excluding "NOT" statements)
     lamina wide-field 1 neuron | absent | larval stage
      --       --       --       --
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optic lobe intrinsic columnar neuron___
adult cholinergic neuron_______________|
optic lobe wide-field columnar neuron__|
                                       lamina wide-field neuron
                                        |__lamina wide-field 1 neuron  43 rec.
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FlyBrain_NDB:10094
VFB:FBbt_00003741