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Figure 11 | BMC Evolutionary Biology

Figure 11

From: Selective neuronal staining in tardigrades and onychophorans provides insights into the evolution of segmental ganglia in panarthropods

Figure 11

Schema comparing the ventral nervous systems of Onychophora, Tardigrada and Arthropoda. Hatched lines indicate the position of legs. Note the anteriorly shifted arrangement of ganglia relative to the legs in tardigrades and arthropods. Diagrams of the onychophoran and arthropod nervous systems according to Mayer and Harzsch [26, 27] and Richter et al. [21]. Abbreviations: al, anterior leg nerve; cf, central fibre mass; cn, somata-free connective; co, commissure; ga, ganglion; ip, interpedal commissure; lv, leg nerve; nc, nerve cord; ne, neuropil; pl, posterior leg nerve.

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