Fig. 1
Anterior parts of preserved (7% Formalin) specimen of a: Myriowenia sp. pa: palp. Dorsal view. ca: caudal; fo: frontal. b: Living specimen of Owenia fusiformis. ey: eye spot; tc: tentacular crown. Lateral view. c-e: μCt volume rendering and 3D-reconstruction of the nervous system of Owenia fusiformis (neuropil only: grey), non- segmental commissures not shown (see Fig. 5a). c: The ventral medullary cord (vmc) arises from paired, perpendicular to the brain ring (br) arranged lateral medullary cords (lmc) which fuse ventrally. d: the brain (br) is circular. tc: tentacle crown; vmc: ventral medullary cord. e: the brain (br) surrounds the mouth opening (mo). lmc: lateral medullary cord; vmc: ventral medullary cord; tc: tentacle crown.