An aglomerular, bilaterally paired synaptic neuropil domain that is the inferior-most domain of the ventrolateral protocerebrum, extending down to the level of the subesophageal ganglion. It receives synaptic input from the saddle and the antennal mechanosensory and motor center (AMMC) within it. This includes direct sensory input from antennal mechanosensory neurons that also innervate the AMMC.