Fig. 10

Details of the nerve element location in the head and adjacent segments of Owenia borealis. CLSM data: Z-projections (A-C) after immunostaining against acetylated alpha-tubulin (grey) and volume rendering (D) after immunostaining against serotonin (orange). A A head with tentacle crown viewed from the ventral side. B A head with some tentacles viewed from the dorsal side. C Left portion of the head viewed from the ventral side. D A portion of the body near the head viewed from the left. Abbreviations: anc – outer ring of the anterior nerve center; atn – aboral tentacle nerves; avc – peripheral zones of the ventral medullary cord; com – ventral commissure; cfp – collar fold dorsal nerve plexus; cn – cross nerve; dcn – dorsal cross nerve; dn – dorsal neurites; lmc – lateral medullary cord; ln – lateral nerve; nep – neuropodia; nop – notopodia; slp – serotonin-like immunoreactive lateral perikarya; t – tentacle; vmc – ventral medullary cord