obsolete larval protocerebral bridge 2011-01-12T02:48:25Z true This term has been obsoleted because it refers to the same structure as 'embryonic/larval protocerebral bridge primordial' (FBbt:00111206) - mc160810. Synaptic neuropil domain of the third instar larval brain that is the precursor of the adult protocerebral bridge. Unlike in the adult, this exists as a pair of separate domains that do not join across the midline. Each has an arched shape, and segmentation is only barely discernible. FBbt:00007557 fly_anatomy.ontology embryonic/larval protocerebral bridge - primordial