Figure 8

Morphology of the brain in Tethysbaena argentarii . Overview and semi-thin sections. A-D: Neuropil and nerves without somata. A: 3D-reconstruction in dorsal view. Anterior directed towards the right. B: 3D-reconstruction in anterior view. C: Schematic drawing in posterior view. Double arrowhead marks a dorsal extension, simple arrowhead marks a lateral extension of the median protocerebrum (Ic). D: Schematic drawing in lateral view. Rocket marks the lateral root of the antenna 1 nerve (A1Nv). E-G, I-K: Horizontal semi-thin sections, ordered from dorsal to ventral. F: Double arrowheads as in A. G: Arrow points at a condensation of neuropil within the anteromedial protocerebral neuropil (AmlPN) that was observed on each body side. H: Virtual transverse section. Dotted lines mark the protocerebral bridge (PB) and the central body (CB). The latter is divided into spheroidal subunits (asterisks). Arrowheads as in A. I: Rocket points at the lateral root of the antenna 1 nerve (A1Nv). Points mark the (only faintly recognizable) olfactory glomeruli in the olfactory lobes (ON). Arrows mark the large posterolateral extensions of lateral somata (LS), which embrace the posterior accessory neuropils (PAN). Scale bars: 50 μm.