FB2026_03 , released September 17, 2026
CV Term Report
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Term larval A02l neuron ID (Ontology) FBbt:00111663 (Fly Anatomy)
Definition Neuron of the larval abdominal neuromere. Its primary neurite extends dorsally, from the ventral region of the ventral nerve cord, close to the midline. It then crosses the midline and follows the dorsal edge of the ventral nerve cord laterally, to terminate in the dorsolateral region. It receives input from the ipsilateral dorsal bipolar neuron dbp and outputs to the contralateral A31k neuron.[ FlyBase:FBrf0231328 ]
CommentThese neurons were identified in a EM reconstruction of a volume that includes the posterior half of abdominal segment 2 and abdominal segment 3, of a 12-24h old first instar larva. The connection to the A31k neuron was only found on one side, as the expected connection on the other side was outside the EM volume. The number of connections was estimated from the publication figures. The number of input synapses was the following (number in brackets left/right): from dbp (8/8). The number of output synapses was the following: to A31k (-/18) (Schneider-Mizell et al., 2016). Thought not to be part of lineage 2 by Mark et al. (2021) - FBrf0249021, as it was not found in any NB2-1 clones.
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VFB:FBbt_00111663
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 larval A02l neuron (all annotations which use CV term, excluding "NOT" statements)
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larval neuron
 |__larval CNS neuron_____________
neuron                            |
 |__abdominal neuron______________|
 |__primary neuron________________|
sensory system neuron             |
 |__proprioceptive system neuron__|
proprioceptive system             |
 |__proprioceptive system neuron__|
CNS neuron                        |
 |__larval CNS neuron_____________|
                                  larval A02l neuron  2 rec.
                                   |__larval abdominal 1 A02l neuron
                                   |__larval abdominal 2 A02l neuron
                                   |__larval abdominal 3 A02l neuron
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Is a abdominal neuron
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VFB:FBbt_00111663