part of develops from capable of part of material entity protocerebrum mushroom body primordium mushroom body Bilaterally paired neuropil structure situated postero-dorsally in the protocerebrum that functions in olfactory associative learning and memory. The mushroom body is divided into: the calyx, which is closest to the cortex and receives sensory interneuron afferents; the pedunculus, which is a thick axon bundle extending from the calyx to the base of the lobes; and the mushroom body lobe system, which consists of a vertical branch and a medial branch, which have different structures at different life stages (Lee et al., 1999; Ito et al., 2014). corpora pedunculata MB FBbt:00005801 VFB:FBbt_00005801 UBERON:0001058 fly_anatomy.ontology This term as defined in Ito et al. (2014) corresponds to both the mushroom body (MB) and calyx (Cal) of Chiang et al. (2011). anterior ectoderm derivative synaptic neuropil block memory