Digital Drosophila ArchivePhase 3B: superclass != null; 166700 neurons including null type. Raw type strings preserved; 11710 paper types are reference only. Original annotation and NT fields use annotation_ and nt_ prefixes, with original dtypes and nulls. NT coverage uses nonempty consensus_nt, without inferred fallback. Mapping is body_id ascending; reverse lookup uses searchsorted with exact equality check. CSR rows are presynaptic sources; columns are postsynaptic targets. Fragment comparison excludes each edge once if either endpoint is a fragment. Nine category totals separate annotation fragments from other unannotated segments. Re-run using processed/.venv/bin/python processed/neuron-only/audit/phase3b-166700/phase3b-neuron-only.py; completed runs verify and do not overwrite. Historical audit in parent audit/ remains unchanged.