part of part of in taxon results in development of anatomical structure development mammillary axonal complex development mammillothalamic axonal tract development The progression of the mammillothalamic axonal tract, from its formation to the mature structure. The mammillothalamic tract is the collection of axons that connects the two major subdivisions of the diencephalon (hypothalamus and thalamus) and closes the diencephalic circuit. GO:0061374 2010-11-09T08:54:43Z dph Craniata <chordates> mammillothalamic axonal tract