Figure 2

Brain morphology in G. insensibilis. (a) and (b) Single horizontal confocal sections in the dorsal and ventral regions of the brain respectively. Cell nuclei stained with propidium iodide appear black (high density of nuclei) or grey (low density). The compound eyes located on either side of the protocerebrum have been removed. (c) Schematic outline of prominent cell clusters, and location of neuropil regions. Terminology [adapted from 86] and abbreviations; aldc, anterior lateral dorsal cell cluster; alvc, anterior lateral ventral cell cluster; an1n, antennal 1 neuropil; an2n, antennal 2 neuropil; cc, circumesophageal cell cluster; cg, circumesophageal ganglion; DT, deutocerebrum; lptc: lateral protocerebral cell cluster; mt: medulla terminalis; ofc, olfactory cell cluster; ofl, olfactory lobe; opc, optic cell cluster; opl, optic lobe; opn, optic nerve; pmptc, paramedial protocerebral cell cluster; PR, protocerebrum; sg, sinus gland; TR, tritocerebrum; vpmc, ventral paramedial cell cluster; vpolc, ventral posterior lateral cell cluster. The width of the brain is approximately 1 mm.