Fig. 8
Detailed organisation of the ventral nerve cords Onychophora as revealed by different markers: antiserum against sysnapsin (a), DNA labelling (b), antisera against GABA (c), dopamine (d), serotonin (e) and octopamine (f). Maximum projection confocal micrographs of Euperipatoides rowelli at the level of leg nerve. Median is up in all images. Asterisks indicate the distribution of somata that is significantly different from uniform (χ2 *, **, ***, ****, p < 0.05, 0.01, 0.001, 0.0001 respectively; n.s. not significant; see Table 1 for more details). a Arrowheads point to few immunoreactive fibres projecting through the perikaryal layer. b Note that the DNA labelling shows a detailed organisation only of a thin sagittal section of the middle part of the nerve cord, hence not all nuclei are visible. ln, leg nerve. Scale bars: 50 μm