FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term adult labial nerve ID (Ontology) FBbt:00004028 (Fly Anatomy)
Definition Mixed sensory-motor nerve that innervates the adult gnathal ganglion (GNG) (Ito et al., 2014). It contains ~195 axons from sensory cells of the labium that enter labial neuromere of the GNG and GNG motor neurons travelling to the labial musculature (Nayak and Singh, 1985; Ito et al., 2014). Proximally, it gives off branches to the rostrum and haustellum, and the labellar glands and sense organs (Miller, 1950). The labial nerve is anastomosed with the maxillary nerve (forming the maxillary-labial nerve) until the latter branches off to the maxillary palp (Nayak and Singh, 1985; Ito et al., 2014).[ FlyBase:FBrf0007735 FlyBase:FBrf0042883 FlyBase:FBrf0224194 ]
Also Known As"labellar nerve" ; "LbN" ; "LN" (for all, see Synonyms field below)
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VFB:FBbt_00004028
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 adult labial nerve (all annotations which use CV term, excluding "NOT" statements)
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head
 |__adult head_______________________
adult tagma                          |
 |__adult head_______________________|
adult nervous system                 |
 |__adult peripheral nervous system__|
peripheral nervous system            |
 |__adult peripheral nervous system__|
nerve                                |
 |__subesophageal nerve______________|
 |__labial nerve_____________________|
                                     adult labial nerve  8 rec.
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Is a subesophageal nerve
labial nerve
Part of adult head
adult peripheral nervous system
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VFB:FBbt_00004028