Extended Data Table 2.

MCM connectivity 

type	presynaptic	postsynaptic	#synapses	#EM sections
chemical	AVF	MCM	16	61
chemical	AVJ	MCM	1	2
chemical	AVM	MCM	1	1
chemical	BDU	MCM	3	7
chemical	CEM	MCM	2	5
chemical	CEP	MCM	1	1
chemical	EF	MCM	6	35
chemical	MCM	ADA	1	3
chemical	MCM	ALM	2	3
chemical	MCM	AQR	2	3
chemical	MCM	AVB	29	61
chemical	MCM	AVF	1	2
chemical	MCM	AVH	1	2
chemical	MCM	BDU	1	3
electrical	MCM	CEM	1	1
chemical	MCM	CEM	5	8
chemical	MCM	CEP	1	1
chemical	MCM	EF	2	3
chemical	MCM	MCM	2	6
chemical	MCM	PVC	1	2
chemical	MCM	PVN	3	3
chemical	MCM	PVU	1	1
chemical	MCM	RIC	2	3
chemical	MCM	RID	1	3
chemical	MCM	RIF	11	23
chemical	MCM	RIM	3	7
chemical	MCM	RIPR	3	6
chemical	MCM	RMD	1	2
chemical	MCM	SIA	1	2
chemical	MCM	SMB	2	3
chemical	MCM	unk1*	2	4
chemical	MCM	unk10*	1	2
chemical	MCM	unk11*	1	2
chemical	MCM	unk12*	1	1
chemical	MCM	unk13*	1	1
chemical	MCM	unk2*	1	3
chemical	MCM	unk3*	1	2
electrical	MCM	unk6*	1	1
chemical	MCM	unk7*	3	7
chemical	MCM	unk8*	4	4
chemical	MCM	unk9*	1	2
chemical	PVC	MCM	1	3
chemical	PVQ	MCM	1	4
chemical	PVS	MCM	1	2
chemical	RIC	MCM	1	1
chemical	RID	MCM	1	1
chemical	RIF	MCM	10	20
chemical	RIM	MCM	3	3
chemical	RMG	MCM	1	2
chemical	SMB	MCM	2	3
chemical	unk14*	MCM	3	15
chemical	unk15*	MCM	1	5
chemical	unk16*	MCM	1	1
chemical	unk4*	MCM	2	3
chemical	unk5*	MCM	1	1

^*unk refers to neurons whose identity has not been unambiguously confirmed in the EM serial sections