FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term larval abdominal ganglion Leucokinin neuron ID (Ontology) FBbt:00110053 (Fly Anatomy)
Definition Larval neuron that expresses Leucokinin (FBgn0028418) whose cell body is located ventrolaterally in each neuromere of the abdominal ganglion. Each neuron produces a pair of axons, one of which projects dorsally and emerges from the ventral ganglia through an anterior segmental nerve of each hemineuromere. The other branch divides centrally into two branches: one send its neurites to the anterior ABLK and the other ventrally to the posterior ABLK. From each segmental nerve one axon emerges that synapses to the adjacent segment border muscle, close to the spiracle (Haro et al., 2010; Landgraf et al., 2003). These synapses lack the typical morphology of motor-neuron synapses (Landgraf et al., 2003) and are not glutamatergic (Haro et al., 2010). There is one pair of neurons in each of seven abdominal neuromeres (de Haro et al., 2010).[ FlyBase:FBrf0155902 FlyBase:FBrf0160715 FlyBase:FBrf0209907 FlyBase:FBrf0210278 ]
Also Known As "larval ABLK neuron" ; "larval Leucokinin ABLK neuron of the abdominal ganglion"
Comment The more anterior ABLK neurons are connected to the leucokinin SELK neuron of the subesophageal ganglion in the dorsal-medial tract (de Haro et al., 2010). Landgraf et al. (2003), also detected leucokinin positive terminals on A1-7 ventral longitudinal (VL) muscles. It is not clear where these neuron originate from.
Links to External Ontologies
VFB:FBbt_00110053
Annotations
Records annotated with this term OR any of its CHILD TERMS
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Data Class Field Records
Alleles (FBal)  PHENOTYPE_MANIFEST_IN      10
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       8
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN       7
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 Full annotation statements 
Relevant FlyBase reports
 Alleles Genes Insertions Constructs
 larval abdominal ganglion Leucokinin neuron (all annotations which use CV term, excluding "NOT" statements)      10      5      8      9
     larval abdominal ganglion Leucokinin neuron | absent | first instar larval stage       2       --       --       1
     larval abdominal ganglion Leucokinin neuron | adult stage | increased number       3       --       --       1
     larval abdominal ganglion Leucokinin neuron | decreased number | first instar larval stage       1       --       --       --
     larval abdominal ganglion Leucokinin neuron | ectopic | first instar larval stage       5       --       --       3
     larval abdominal ganglion Leucokinin neuron | ectopic | first instar larval stage | increased number       2       --       --       1
     larval abdominal ganglion Leucokinin neuron | ectopic | third instar larval stage       2       --       --       1
     larval abdominal ganglion Leucokinin neuron | first instar larval stage | increased number       2       --       --       1
Spanning Tree (Parents/Children)
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neuron
 |__abdominal neuron________________________________________
larval neurosecretory neuron                                |
 |__larval Leucokinin neuron of the central nervous system__|
larval peptidergic neuron                                   |
 |__larval Leucokinin neuron of the central nervous system__|
larval CNS neuron                                           |
 |__larval Leucokinin neuron of the central nervous system__|
Leucokinin neuron                                           |
 |__larval Leucokinin neuron of the central nervous system__|
                                                            larval abdominal ganglion Leucokinin neuron  32 rec.
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Is a abdominal neuron
larval Leucokinin neuron of the central nervous system
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VFB:FBbt_00110053