Table 1.

Ventral diencephalic dopaminergic clusters (Introduction).

Name	Description	Group	Homology	Mol. marker	Cells and anatomical position	Known projections
PTar	Anterior PT rostral group	DC2	A11	otp	Large, pear-shaped, in peri-ventricular nucleus of PT	Endohypothalamic, ascending: SP descending: Rh, SC
PTac	Anterior PT caudal group	DC4	A11	otp	Large, in periventricular nucleus of caudal PT	Endohypothalamic, descending: Rh, SC
PTp	Posterior PT posterior group	DC5	A11	otp	Small round cells of peri-ventricular nucleus of PT	Fewer or no connections to the SC
PTN	Posterior tuberal nucleus	DC6	A11	otp	Small round cells of posterior tuberal nucleus	Few or no connections to the SC
Hdm	Dorsal medial hypothalamus	DC3	A14	nkx2.1	Small round liquor contacting cells	Local, hypothalamic
				nkx2.2
Hc	Caudal hypothalamus	DC7	A14	nkx2.1	Small cells in caudal hypothalamus	Local, hypothalamic

Groups of DA neurons in the diencephalon named according to their anatomical location. Molecular markers suggest homology to mammalian DA groups (Ryu et al., 2007; Yamamoto and Vernier, 2011). Zebrafish DA clusters (DC) have previously been numbered from rostral to caudal (Rink and Wullimann, 2001). Far projecting neurons send descending projections into the rhombencephalon, spinal cord and to peripheral sensory organs. nkx 2.1, NK2 homeobox 1 transcription factor; otp, Orthopedia transcription factor; PT, posterior tuberculum; Rh, rhombencephalon; SC, spinal cord; SP, subpallium.