Additional file 2.

Organisation of the ventral nervous system in the tardigrade Hypsibius dujardini. Note the extra-ganglionic, interpedal commissures in front of the second, third and fourth trunk ganglia (arrowheads). Combined anti-tyrosinated and anti-acetylated α-tubulin immunolabelling. Confocal micrographs; anterior is up. (A) Specimen in lateral view. (B) Specimen in ventral view. Abbreviations: al, anterior leg nerve; cn, connective; ga2–ga4, trunk ganglia 2 to 4; lg, leg ganglion; pl, posterior leg nerve; pn, peripheral nerve. Scale bars: 10 μm.

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Mayer et al. BMC Evolutionary Biology 2013 13:230   doi:10.1186/1471-2148-13-230