Fig. 3

Localization of neuronal somata associated with the first post-oral commissure in Euperipatoides rowelli. Retrograde fills. Syringes indicate the corresponding fill sites. a, b Maximum projection confocal micrograph of a double fill with dextran coupled to two different fluorochromes. Dorsal view, anterior is up. Note the position of somata in the connecting cords (group IV) and in the deutocerebrum (groups I–III), some of which lie in the contralateral brain hemisphere (group II). c Overview diagram illustrating the position of neurons associated with the first post-oral commissure in lateral view. d Overview diagram demonstrating the position of neurons associated with the first post-oral commissure in dorsal view. at antennal tract, cc connecting cord, dc deutocerebrum, ey eye, ho hypocerebral organ, jn jaw nerve, pc protocerebrum, rc ring commissure, sn slime papilla nerves. Scale bars (in a, b) 100 µm