adult protocerebral bridge 1 glomerulus-fan-shaped body-lateral accessory lobe neuron obsolete horizontal fiber system neuron pb8 2011-01-12T03:00:37Z https://github.com/FlyBase/drosophila-anatomy-developmental-ontology/issues/1097 true Horizontal fiber system neuron that innervates protocerebral bridge glomerulus 9, fasciculates with pb-fb tract W, innervates the ipsilateral fan-shaped body segment pair W and the ipsilateral lateral accessory lobe. Obsoleted, as it is not clear what currently recognized cell type this term refers to. Wolff et al. (2015) identified an extra protocerebral bridge glomerulus, in the most medial position, meaning that the glomerulus 8 that Hanesch et al. (1989) refers to, corresponds to glomerulus 9. Other 'horizontal fiber system neurons' from Hanesch et al (1989) map to protocerebral bridge-fan-shaped body-round body (PFR) neurons, but PFR neurons are not found in glomerulus 9. See figure 6 of Hanesch et al. (1989). FBbt:00007567 fly_anatomy.ontology