Fig. 2.

Schematic drawing of female Osedax “nudepalp E” brain, based upon immunohistochemical studies. Acetylated α-tubulin IR shown in black, serotonin LIR shown in red. Only major neurite bundles shown, minor bundles and neurites traversing the neuropil are not shown for clarity. Abbreviations: acbr – anterior commissure of the brain, adn – antero-dorsal nerve, ann – anterior nerve net, aon – anterior oviduct nerve, cnn – circular nerve net, dln – dorso-lateral nerve bundle, dlpn 1,2 – dorsal left palp nerve 1, 2, lln – lateral longitudinal neurite bundles in the brain, mcc – middle cross commissure, msc – middle serotonergic commissure, pcbr – posterior commissure of the brain, pcnn – perikarya of the cnn, pvc – perikarya of the vc, vc – ventral cord, vcp – ventral cord projection, vln – ventro-lateral nerve, vlpn1,2 – ventral left palp nerve 1,2, vpann – ventral perikarya of ann