Figure 6

Central complex of Campodea augens . A) Horizontal section showing the protocerebral bridge (pb, on one side indicated by dashed line) and the central body (cb). Tracts (asterisk) extending through the pb form a chiasma (arrow) before entering the cb columns. mb1: mushroom body 1. amp: anterio-median protocerebral neuropil (dashed line). B) TK-like ir is observed in a middle layer (asterisk) of the central body. Arrow: mb1 Red: TK, green: phalloidin, blue: DAPI. C) AS-like ir present predominantly in a posterior and an anterior layer of the central body (asterisks). Red: AS, green: phalloidin, blue: DAPI. D) Tentative diagram of the central body connectivity. Tracts (t[x]) passing through the protocerebral bridge supply the cenctral body median column (0) and lateral columns (1 to 4). tn: tangential neurons E) RFamide-like ir in the central body. Note neurites innervating the columns from their anterior face (arrow). Scale bars: D: 25 μ m, others: 20 μ m.