Figure 3.

Neuropil organization of the brain in Catajapyx aquilonaris and Metajapyx braueri. A) Overview of the brain of Catajapyx aquilonaris. Mushroom bodies indicated by asterisks. B and C) Cross sections of the deutocerebrum of Metajapyx braueri. Group of small lateral olfactroy glomeruli indicated by arrow. One of the larger dorsal olfactory glomeruli is marked by a plus sign. The medio-ventral (mvdn) and latero-ventral (lvdn) glomerular deutocerebral neuropils are indicated by one or two asterisks, respectively. D) Cross section through the central body of Metajapyx braueri. The median column (asterisk) protrudes above the others. E) Deutocerebrum of Catajapyx aquilonaris. Detail of neurites (arrow) entering the mvdn, a cup-shaped medial neuropil (dashed line). This structure is separated from its counterpart in the opposing hemisphere by a connective tissue layer. F) Protocerebral bridge of Metajapyx braueri. Abbreviations: alp antero-lateral protocerebrum, amp antero-median protocerebrum, act1 antenno-cerebral tract 1, cb central body, kc Kenyon cells, mvdn medio-ventral deutocerebral neuropil, lvdn latero-ventral deutocerebral neuropil, pb protocerebral bridge, clx[x] calyx x. Scale bars: A: 50 μm, B, C: 25 μm, D, E, F: 20 μm.