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Mushroom Body Evolution - Figure 5 |
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Figure 5: There are two types of insect mushroom bodies: calyxless and calycal. Column A, top, shows a damselfly (a palaeopteran) and, beneath it, parts of its medial protocerebrum showing the medial (M) and vertical (L) lobes of one of its mushroom bodies. The inset shows globuli cells (glob) providing two strands of cell body fibers (cbf) that extend forwards to the lobes. Column B shows a predatory wasp (top) and beneath it, parts of its posterior protocerebrum and antennal lobe (ant lob). The globuli cells (glob) reside at the same location in the brain as they do in a palaeopteran. However, what were two strands of cell body fibers in the palaeopteran are now hugely enlarged calyces (ca). Kenyon cell axons from the calyces converge into the pedunculus (ped).
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