substantia nigra http://upload.wikimedia.org/wikipedia/commons/5/5f/Midbraincrosssection.png http://braininfo.rprc.washington.edu/centraldirectory.aspx?ID=536 BIRNLEX:789 UMLS:C1269578 Subdivision of the midbrain anterior to the midbrain tegmentum which contains darkly pigmented neurons[FMA][FMA:67947]. nucleus pigmentosus subthalamo-peduncularis EMAPA:35835 (...) the substantia nigra first appears in reptiles and is best developed in primates.[well established][VHOG] Soemmering's substance Predominantly gray matter midbrain structure lying dorsal to the crus cerebri and ventral to the midbrain tegmentum. It is divided into a dorsal, cellularly compact region known as the pars compacta and a more ventrally located, containing more loosely packed cells, the pars reticulata. The most lateral region of the reticulata is identified as the pars lateralis (MM). DHBA:12251 NCIT:C12453 nucleus of basis pedunculi TODO - In BTO and NIF, part of basal ganglion which is part of telencephalon - but this is inconsistent with being part of midbrain, if these are spatially disjoint, as in ABA BAMS:SN HBA:9072 uberon MA:0000210 substancia nigra EFO:0000922 CALOHA:TS-0990 UMLS:C0038590 VHOG:0001573 MAT:0000504 FMA:67947 GAID:581 BTO:0000143 EHDAA2:0004711 SN MESH:A08.186.211.132.659.687 EV:0100247 substantia nigra (Soemmerringi) UBERON:0002038 midbrain nucleus