FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term superior intermediate protocerebrum ID (Ontology) FBbt:00045032 (Fly Anatomy)
Definition A small synaptic neuropil domain of the adult located around and posterior to the mushroom body vertical lobe, in front of the superior fiber system and above the superior clamp. This domain is rich in loose fibers that project from the anterior optic tubercle in a medial-posterior direction. It also houses the arborizations of many neurons that connect with the vertical lobes.[ FlyBase:FBrf0193607 FlyBase:FBrf0211016 FlyBase:FBrf0212704 FlyBase:FBrf0224194 ]
Also Known As"SIP"
CommentThe SIP encompasses the ring neuropil, which corresponds to the terminals of the mlALT neurons, which wrap around the distal tip region of the mushroom body vertical lobe (Ito et al., 2014). Different regions of the SIP correspond to the subdivisions of the smpr and impr (Otsuna and Ito, 2006). The anterior and posterior regions of the superior SIP match part of smpr; the anterior and posterior regions of the inferior SIP match part of impr (Ito et al., 2014). The SIP correspond to the medial part of the dorsolateral protocerebrum (DLP) and the frontal superpeduncular protocerebrum (FSPP) of Chiang et al. (2011).
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VFB:FBbt_00045032
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Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
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 superior intermediate protocerebrum (all annotations which use CV term, excluding "NOT" statements)
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protocerebrum
 |__adult protocerebrum_________
adult cerebrum                  |
 |__superior neuropils__________|
multi-cell-component structure  |
 |__synaptic neuropil domain____|
synaptic neuropil               |
 |__synaptic neuropil domain____|
synaptic neuropil block         |
 |__superior neuropils__________|
adult neuromere                 |
 |__adult protocerebrum_________|
adult supraesophageal zone      |
 |__adult protocerebrum_________|
                                superior intermediate protocerebrum  3770 rec.
                                 |__ring neuropil
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Is a synaptic neuropil domain
Develops from embryonic/larval superior lateral protocerebrum
Part of adult protocerebrum
superior neuropils
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VFB:FBbt_00045032