Table 2.

Pattern of innervation by fibers containing the different transmitters involved in male reproduction of hermaphroditic freshwater snails.

Transmitter	innervation pattern											References
	np	PRM	PP	PE	VD	pace.	PG	SD	HD	SV	OO
APGW		+	+	+	+	+	+					Van Golen et al. (1995a,b); Van Kesteren et al. (1992); De Lange et al. (1998a)
Conopressin		+	+	+	+	+						Van Golen et al. (1995a,b); Van Kesteren et al. (1992)
C-terminally located anterior lobe peptide (CALP)
DEILSR			+				+					De Lange et al. (1998a)
EFLRI		+	+	+								Bright et al. (1993); Santama et al. (1993, 1995); Van Golen et al. (1995a,b)
FLRF		+	+	+								Bright et al. (1993); Santama et al. (1993, 1995); Van Golen et al. (1995a,b)
FMRF		+	+	+				+	+	+	+	Schott and Boer (1982); Bright et al. (1993); Santama et al. (1993, 1995); Van Golen et al. (1995a,b); De Lange et al. (1997, 1998a)
FVRIs	+		+		+							El Filali et al. (2006)
G/SDPFLRF
Gonadotropin releasing hormone (GnRH)	+											Young et al. (1999)
Lymnaea inhibitory peptides (LIP A, B, C)	+	+	+	+	+	+						Smit et al. (2003); De Lange et al. (1998a)
Lymnaea neuopeptide Y (LyNPY)		+				+						De Lange et al. (1997)
Myomodulins	+	+										Li et al. (1994a,b)
Pedal peptide (PP)			+									De Lange et al. (1998a)
pQFYRI		+	+	+								Bright et al. (1993); Santama et al. (1993, 1995); Van Golen et al. (1995a,b)
SEEPLY		+	+	+								Bright et al. (1993); Santama et al. (1993, 1995); Van Golen et al. (1995a,b); De Lange et al. (1998a)
Serotonin (5HT)			+	+	+							Croll and Chiasson (1989)

HD, hermaphroditic duct; np, nervus penis; OO, oothecal gland; pace, pacemaker area of vas deferens; PE, penis; PG, prostate gland; PP, preputium; PRM, preputial retractor muscle; SD, sperm duct; SV, seminal vesicles; VD, vas deferens. Locations with a plus (+) indicate that nerve fibers containing thetransmitter have been detected