part of part of in taxon Teleostei Acipenseridae diencephalic nucleus magnocellular superficial pretectal nucleus UBERON:0035563 TAO:0000235 magnocellular superficial pretectal nuclei ZFA:0000235 Diencephalic nucleus that is part of the superficial pretectum and is caudally contiguous with the caudal pretectal nucleus. Cells of the magnocellular superficial pretectal nucleus are slightly larger and more orderly around a central neuropil than those of the caudal pretectal nucleus. From Neuroanatomy of the Zebrafish Brain. A nucleus that is part of the superficial pretectum and is characterized by large widely scattered cells. PSm superficial pretectal nucleus superficial pretectum