Table 1 Unpruned axon and axon debris quantitation.

(a) Presence of unpruned axons in ≥1-week-old adults
	MB	None	Weak	Strong
WT	25	25	0	0
Hr39	22	0	0	22
orion^ΔC	22	0	22	0
orion¹	20	0	20	0
orion RNAi	34	0	34	0
drpr^Δ5	22	20	2	0

(b) Presence of axon debris in ≥1-week-old adults
	MB	None	Mild	Intermediary	Strong
WT	25	25	0	0	0
Hr39	22	22	0	0	0
orion^ΔC	22	0	0	0	22
orion¹	20	0	0	0	20
orion RNAi	34	34	0	0	0
drprΔ5	22	16	2	2	2

(c) Presence of axon debris in ≤2-h-old adults
	MB	Scattered dots	Mild	Intermediary	Strong
WT	10	10	0	0	0
orion^ΔC	12	0	0	0	12
drpr^Δ5	73	40	11	4	18

Genotypes are indicated on the left. “MB” indicates the number of mushroom bodies observed for each genotype. Unpruned axons were ranked into three categories: “None” indicates the absence of unpruned γ axons and “Weak” and “Strong” refer to different levels of the mutant pruning phenotype. Axon debris were ranked into five categories: “None” indicates the absence of debris and “Scattered dots” means that some individual debris can be observed. “Mild,” “Intermediate,” and “Strong” refer to different levels of debris (see Supplementary Fig. 2 and “Methods”). Full genotypes are listed in the Supplementary list of fly strains.

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